Skip to content

Oman vs Tanzania statistics compared

Updated on by Georank team

Oman has a population of 5.28M (ranked 124/197), compared with 68.6M in Tanzania (ranked 22/197). Oman's land area is 119,499 sq mi versus 342,009 sq mi for Tanzania (ranked 68th vs. 31st).

By GDP, Oman ranks 70/197 ($107B) and Tanzania ranks 82/197 ($78.8B). By GDP per capita, Oman ranks 57/197 ($20,248), while Tanzania ranks 170/197 ($1,149).

Main facts and rankings

Oman Tanzania
Population
5636678
72166806
Population rank 120/197 20/197
GDP
$107B
2024
$78.8B
2024
GDP rank 70/197 82/197
GDP per capita
$20,248
2024
$1,149
2024
GDP per capita rank 57/197 170/197
GDP per capita, PPP
$41,664
2024
$4,221
2024
Government debt
$38B
2024
$38B
2024
Debt-to-GDP ratio
35.4%
2025
47.1%
2025
Government debt per person
$7,191
2024
$554
2024
Government debt per person rank 68/185 163/185
Average annual personal income after taxes
$20,368
2025
$2,745
2025
Land area
119,499 sq mi
2025
342,009 sq mi
2025
Population density
44.2 ppl/mi²
2024
200.5 ppl/mi²
2024
Fertility rate
2.53
2023
4.61
2023
Median age
30.5 years
2024
18.4 years
2024
Life expectancy
80.5 years
2025
67.4 years
2025

Oman and Tanzania: Comparison Charts

Oman and Tanzania economies compared

GDP
Oman

Tanzania
Year GDP
Oman Tanzania
1960 $44,234,656 $2,651,729,807
1961 $45,634,487 $2,826,179,031
1962 $56,273,202 $3,101,589,993
1963 $59,912,763 $3,456,579,293
1964 $61,872,526 $3,748,840,925
1965 $63,279,975 $3,817,226,546
1966 $67,759,973 $4,377,998,825
1967 $107,151,832 $4,565,132,048
1968 $188,879,849 $4,895,251,824
1969 $239,999,808 $5,142,066,811
1970 $256,319,795 $2,851,419,386
1971 $301,010,587 $3,050,673,517
1972 $366,883,548 $3,472,787,266
1973 $483,066,991 $4,144,104,535
1974 $1,645,917,776 $4,977,337,978
1975 $2,096,699,189 $5,729,917,840
1976 $2,560,220,035 $6,472,511,988
1977 $2,741,169,948 $7,732,598,995
1978 $2,740,301,390 $9,261,675,710
1979 $3,733,352,635 $9,804,637,491
1980 $5,981,760,278 $11,409,228,087
1981 $7,259,120,151 $13,161,540,378
1982 $7,554,719,456 $13,927,383,240
1983 $7,932,541,691 $14,049,883,809
1984 $8,821,443,151 $12,906,635,133
1985 $10,005,645,420 $15,328,295,175
1986 $7,324,167,369 $10,840,864,521
1987 $7,811,183,095 $7,824,193,222
1988 $8,386,215,865 $7,406,614,407
1989 $9,372,171,651 $6,418,799,007
1990 $13,310,273,082 $6,184,384,225
1991 $12,918,335,501 $7,197,768,159
1992 $14,183,615,085 $6,681,997,469
1993 $14,230,429,129 $6,182,872,708
1994 $14,715,214,564 $6,550,480,484
1995 $15,722,236,671 $7,631,431,840
1996 $17,402,080,624 $9,433,528,150
1997 $18,039,791,938 $11,158,197,942
1998 $16,044,213,264 $12,172,790,056
1999 $17,832,769,831 $12,704,334,196
2000 $22,259,557,867 $13,371,767,082
2001 $22,205,721,717 $13,563,990,022
2002 $23,065,539,662 $14,129,651,896
2003 $24,733,680,104 $15,211,487,709
2004 $28,378,933,680 $16,673,062,473
2005 $35,506,892,068 $18,395,383,647
2006 $42,577,633,290 $18,619,859,795
2007 $48,300,390,117 $21,860,434,823
2008 $69,804,681,404 $27,947,821,398
2009 $55,454,096,229 $29,400,573,554
2010 $64,993,498,049 $32,012,892,919
2011 $77,497,529,259 $34,657,140,096
2012 $87,408,842,653 $39,650,394,363
2013 $89,936,020,806 $45,648,857,242
2014 $92,699,089,727 $49,986,726,461
2015 $78,710,793,238 $47,413,919,817
2016 $75,128,738,622 $49,774,409,374
2017 $80,856,697,009 $53,274,884,533
2018 $91,505,851,756 $57,003,712,892
2019 $88,060,858,257 $61,026,731,926
2020 $75,909,492,848 $66,068,737,786
2021 $87,323,797,139 $70,655,628,148
2022 $109,852,795,839 $75,769,974,505
2023 $105,895,708,713 $79,062,403,837
2024 $106,942,782,835 $78,779,864,877

Oman and Tanzania economies compared

GDP per capita
Oman

Tanzania
Year GDP per capita
Oman Tanzania
1960 $83.4 $267.8
1961 $84.5 $277.4
1962 $102.3 $295.7
1963 $106.8 $320
1964 $108.1 $337
1965 $108.1 $333
1966 $113.2 $370
1967 $174.7 $374
1968 $300 $388
1969 $372 $394
1970 $387 $211.3
1971 $442 $218.4
1972 $524 $239.8
1973 $670 $276.1
1974 $2,203 $320
1975 $2,692 $355
1976 $3,143 $387
1977 $3,205 $446
1978 $3,044 $515
1979 $3,934 $527
1980 $5,974 $595
1981 $6,866 $665
1982 $6,759 $683
1983 $6,714 $667
1984 $7,070 $593
1985 $7,549 $681
1986 $5,182 $466
1987 $5,204 $326
1988 $5,279 $299
1989 $5,591 $252.3
1990 $7,546 $236.9
1991 $6,977 $268.8
1992 $7,318 $243.4
1993 $7,039 $218.2
1994 $7,068 $222.5
1995 $7,414 $251.2
1996 $8,068 $305
1997 $8,235 $353
1998 $7,219 $375
1999 $7,915 $382
2000 $9,754 $390
2001 $9,612 $385
2002 $9,869 $391
2003 $10,464 $410
2004 $11,801 $438
2005 $14,435 $469
2006 $16,931 $462
2007 $18,793 $528
2008 $26,577 $657
2009 $20,656 $674
2010 $23,570 $715
2011 $25,188 $753
2012 $24,642 $837
2013 $23,458 $935
2014 $23,161 $993
2015 $18,808 $911
2016 $17,110 $925
2017 $17,820 $957
2018 $19,902 $992
2019 $19,180 $1,031
2020 $16,785 $1,084
2021 $19,403 $1,125
2022 $23,224 $1,171
2023 $20,972 $1,187
2024 $20,248 $1,149

Oman vs. Tanzania life expectancy calculator

Life expectancy
Oman

Tanzania
Year Life expectancy, years
Oman Tanzania
1950 29.3 41
1951 29.8 41.2
1952 30.2 41.4
1953 30.7 41.5
1954 31.2 41.7
1955 31.8 41.8
1956 32.4 42
1957 33 42.1
1958 33.8 42.3
1959 34.6 42.5
1960 35.4 42.6
1961 36.4 42.8
1962 37.4 43.2
1963 38.5 43.6
1964 39.6 44.1
1965 40.8 44.5
1966 42 44.9
1967 43.2 45.2
1968 44.4 45.6
1969 45.6 46
1970 46.6 46.5
1971 47.9 47
1972 48.7 47.4
1973 50 47.9
1974 51.2 48.4
1975 52.5 48.9
1976 54.4 49.5
1977 55.5 50
1978 57 50.4
1979 58.3 50.8
1980 59.6 51.3
1981 60.8 51.7
1982 62 52
1983 63.2 52.2
1984 64.3 52.2
1985 65.3 52.2
1986 66.2 52.2
1987 67 52.2
1988 67.7 52.2
1989 68.4 52.1
1990 69 52
1991 69.6 51.8
1992 70.1 51.4
1993 70.6 51.2
1994 71.1 51.1
1995 71.6 51
1996 72 51.1
1997 72.5 51.2
1998 72.9 51.8
1999 73.3 52.4
2000 73.6 53.2
2001 74 54.1
2002 74.3 54.9
2003 74.5 55.9
2004 74.8 56.8
2005 75.1 57.7
2006 75.4 58.5
2007 75.6 59.3
2008 76.1 59.9
2009 76.6 60.5
2010 77.2 61.1
2011 77.7 61.6
2012 78.2 62.3
2013 78.6 62.8
2014 79 63.4
2015 79.3 63.9
2016 79.6 64.4
2017 79.7 65
2018 79.9 65.5
2019 79.9 66
2020 77.8 66.8
2021 76 66.1
2022 77.9 66.9
2023 80 67
2024 80.2 67.2
2025 80.5 67.4

Oman and Tanzania population clocks and comparison

Population
Oman

Tanzania
Year Population
Oman Tanzania
1960 530,485 9,901,419
1961 539,854 10,187,886
1962 549,941 10,487,756
1963 560,827 10,799,528
1964 572,577 11,127,826
1965 585,236 11,470,728
1966 598,804 11,827,459
1967 613,318 12,200,109
1968 628,798 12,602,076
1969 645,255 13,036,700
1970 662,680 13,492,677
1971 681,119 13,971,451
1972 700,593 14,479,308
1973 721,179 15,010,101
1974 746,988 15,561,630
1975 778,864 16,138,361
1976 814,701 16,736,211
1977 855,314 17,352,929
1978 900,304 17,976,566
1979 949,116 18,592,038
1980 1,001,248 19,189,769
1981 1,057,320 19,784,703
1982 1,117,678 20,398,571
1983 1,181,459 21,079,874
1984 1,247,716 21,779,066
1985 1,325,480 22,501,693
1986 1,413,419 23,258,959
1987 1,500,996 24,030,378
1988 1,588,568 24,769,686
1989 1,676,228 25,438,759
1990 1,763,954 26,110,207
1991 1,851,473 26,780,436
1992 1,938,238 27,457,588
1993 2,021,675 28,332,692
1994 2,081,834 29,442,356
1995 2,120,528 30,383,497
1996 2,156,926 30,945,762
1997 2,190,720 31,578,089
1998 2,222,489 32,420,458
1999 2,252,909 33,300,330
2000 2,282,131 34,260,139
2001 2,310,217 35,198,299
2002 2,337,140 36,121,304
2003 2,363,796 37,089,555
2004 2,404,821 38,109,668
2005 2,459,802 39,182,076
2006 2,514,795 40,294,902
2007 2,570,174 41,435,512
2008 2,626,529 42,570,728
2009 2,684,659 43,633,982
2010 2,757,446 44,758,488
2011 3,076,763 46,029,367
2012 3,547,106 47,374,260
2013 3,833,913 48,824,128
2014 4,002,439 50,351,512
2015 4,184,895 52,020,962
2016 4,390,877 53,824,013
2017 4,537,396 55,652,890
2018 4,597,877 57,437,145
2019 4,591,241 59,174,891
2020 4,522,497 60,972,798
2021 4,500,424 62,830,412
2022 4,730,226 64,711,821
2023 5,049,269 66,617,606
2024 5,281,538 68,560,157

Fertility rates in Oman and Tanzania

Fertility rate
Oman

Tanzania
Year Fertility rate
Oman Tanzania
1960 7.28 6.54
1961 7.29 6.56
1962 7.32 6.61
1963 7.33 6.65
1964 7.37 6.68
1965 7.39 6.73
1966 7.41 6.8
1967 7.44 6.86
1968 7.46 6.9
1969 7.49 6.95
1970 7.52 7
1971 7.56 7.04
1972 7.59 7.05
1973 7.63 7.06
1974 7.67 7.12
1975 7.71 7.1
1976 7.74 7.09
1977 7.78 7.07
1978 7.82 7.06
1979 7.85 7.04
1980 7.89 6.99
1981 7.9 6.93
1982 7.84 6.87
1983 7.75 6.81
1984 7.64 6.72
1985 7.51 6.6
1986 7.35 6.49
1987 7.18 6.41
1988 6.95 6.38
1989 6.72 6.3
1990 6.46 6.2
1991 6.2 6.14
1992 5.92 6.08
1993 5.64 6
1994 5.36 5.89
1995 5.07 5.82
1996 4.79 5.83
1997 4.52 5.84
1998 4.27 5.81
1999 4.06 5.75
2000 3.85 5.67
2001 3.66 5.62
2002 3.51 5.57
2003 3.37 5.58
2004 3.2 5.6
2005 3.03 5.58
2006 2.88 5.51
2007 2.76 5.4
2008 2.76 5.32
2009 2.83 5.26
2010 2.97 5.23
2011 2.96 5.14
2012 2.93 5.14
2013 2.95 5.16
2014 2.97 5.12
2015 2.97 5.03
2016 2.95 5.01
2017 2.92 4.99
2018 2.81 4.93
2019 2.7 4.87
2020 2.64 4.8
2021 2.59 4.73
2022 2.45 4.67
2023 2.53 4.61

Oman and Tanzania demographics compared

Median age
Oman

Tanzania
Year Median age, years
Oman Tanzania
1960 18.9 17.4
1961 18.8 17.4
1962 18.7 17.4
1963 18.6 17.4
1964 18.5 17.4
1965 18.4 17.3
1966 18.2 17.2
1967 18 17.2
1968 17.8 17.1
1969 17.5 17.1
1970 17.2 17.1
1971 16.9 17
1972 16.7 17
1973 16.4 17
1974 16.3 16.9
1975 16.2 16.9
1976 16.3 16.8
1977 16.3 16.8
1978 16.4 16.7
1979 16.4 16.6
1980 16.4 16.5
1981 16.5 16.4
1982 16.5 16.3
1983 16.5 16.2
1984 16.5 16.2
1985 16.6 16.3
1986 16.8 16.4
1987 17.1 16.5
1988 17.5 16.6
1989 17.9 16.6
1990 18.4 16.7
1991 18.8 16.7
1992 19.4 16.8
1993 19.9 17
1994 20.1 17.3
1995 20.1 17.4
1996 20.1 17.4
1997 20.2 17.3
1998 20.4 17.3
1999 20.6 17.4
2000 20.9 17.4
2001 21.3 17.5
2002 21.6 17.5
2003 22 17.4
2004 22.3 17.4
2005 22.7 17.4
2006 23.1 17.4
2007 23.5 17.3
2008 24 17.3
2009 24.6 17.2
2010 25.2 17.2
2011 26.5 17.2
2012 27.7 17.3
2013 28.2 17.3
2014 28.5 17.4
2015 28.8 17.5
2016 29.1 17.6
2017 29.4 17.8
2018 29.7 17.9
2019 29.9 17.9
2020 29.7 18
2021 29.7 18.1
2022 30 18.2
2023 30.3 18.3
2024 30.5 18.4

Interactive Maps

Use the buttons below to switch between world maps comparing statistics for Oman and Tanzania.

GDP per capita

GDP

Life expectancy

Population

Population density

Fertility rate

Median age

Land area

National statistics comparison

Finance

Oman Tanzania
GNI, Atlas method
$102B
2024
$80B
2024
Government expenditure, % of GDP
28.2%
2025
19.2%
2025
Education expenditure, % of GDP
4.3%
2022
3.16%
2024
Military expenditure, % of GDP
5.4%
2023
1.15%
2023
Armed forces personnel
47,000
2020
28,000
2020
Deficit/surplus, % of GDP
+1.24%
2025
-2.89%
2025
Unemployment rate
3.3%
2022
1.79%
2020
Services, % of GDP
46.5%
2024
28.4%
2024
Industry, % of GDP
54.2%
2024
28.7%
2024
Economic freedom index
65.4
2025
59.3
2025
Income share by richest 10% n/a
33.1%
2018
Income share by poorest 10% n/a
2.9%
2018
Number of billionaires
2
2025
1
2025
Percentage of billionaires
0.00005%
2025
0.000003%
2025
Listed domestic companies
110
2022
22
2024
Market capitalization of domestic companies
$22.3B
2022
$7.32B
2024
Total reserves including gold
$18.3B
2024
$5.05B
2018
Personal remittances received
$39M
2024
$750M
2024
International tourist arrivals
869,000
2020
1,527,000
2019
International tourism as share of exports
1.87%
2020
27.2%
2019
Banked people share
69.5%
2024
59.8%
2024

Energy

Oman Tanzania
Energy use, kg of oil equivalent per capita
5,867 kg
2022
405 kg
2022
GDP PPP per kg equivalent of energy use
$7.26
2022
$9.09
2022
Carbon dioxide (CO2) emissions
93.1 megatons
2023
19.4 megatons
2023
CO2 emissions per capita
18.4 tons
2023
0.29 tons
2023
Fossil fuel energy use share
99.7%
2022
23.1%
2022
Renewable energy use share
0.1%
2021
78.3%
2021
Alternative and nuclear energy use share
0.33%
2022
0.93%
2022
Net energy imports use share
-213.6%
2022
12.9%
2022
Electric power consumption per capita
8,158 kWh
2022
123.5 kWh
2022
Renewable electricity output share
1.95%
2021
39.4%
2021
Hydroelectric share
0%
2021
29.3%
2022
Nuclear share
0%
2021
0%
2021
Electricity access
100%
2023
48.3%
2023

Society

Oman Tanzania
% of world population
0.06%
2024
0.84%
2024
Annual migration change
+154,219
2024
-29,865
2024
Urban population
89%
2024
38.1%
2024
Male:Female ratio
50:50
2024
50:50
2024
Average male height
5.63 ft
2025
5.48 ft
2025
Average female height
5.2 ft
2025
5.15 ft
2025
Quality of life index
68
2025
37.5
2025
Corruption Perceptions Index
55
2024
41
2024
Higher education index
60
2025
50
2025
Homicides per 100K people
0.14
2023
3.71
2020
Road traffic mortality per 100K people
10.6
2019
31.1
2019
Visa free countries
99
2025
76
2025
Adult literacy rate
97.3%
2022
78.2%
2022
English speaking
22%
2025
9.89%
2023
People using the Internet
95.3%
2024
29.1%
2023

Health

Oman Tanzania
Government health expenditure per capita
$707
2022
$35.6
2022
Out-of-pocket health expenditure per capita
$52.9
2022
$10.2
2022
Life expectancy
80.5 years
2025
67.4 years
2025
Foreign aid share of health expenditure
0%
2022
38.7%
2022
Physicians per 1,000 people
2.06
2022
0.13
2022
Age at first childbirth n/a
19.9 years
2025
Maternal mortality per 100K births
13
2023
276
2023
Mortality rate before reaching 5 years of age, per 1,000 live births
10.4
2023
38.9
2023
Obesity rate
32.4%
2022
13%
2022
Diabetes prevalence
17%
2024
9.8%
2024
Air quality index
11
2025
37
2025
Tobacco use prevalence
8.4%
2022
9.3%
2022
Pure alcohol consumption per capita
0.51 liters
2020
11 liters
2020

Territory

Oman Tanzania
% of world land
0.21%
2025
0.59%
2025
Land area per capita
22,626 sq mi
2024
4,988 sq mi
2024
Agricultural land area
5,682 sq mi
2025
152,592 sq mi
2025
Forest area
9.11 sq mi
2025
171,190 sq mi
2025
Roads length n/a
90,225 mi
2022

In-depth comparisons

Facts comparisons

Facts vs Oman vs Tanzania
Afghanistan Compare Compare
Albania Compare Compare
Algeria Compare Compare
Andorra Compare Compare
Angola Compare Compare
Antigua Compare Compare
Argentina Compare Compare
Armenia Compare Compare
Australia Compare Compare
Austria Compare Compare
Azerbaijan Compare Compare
Bahamas Compare Compare
Bahrain Compare Compare
Bangladesh Compare Compare
Barbados Compare Compare
Belarus Compare Compare
Belgium Compare Compare
Belize Compare Compare
Benin Compare Compare
Bhutan Compare Compare
Bolivia Compare Compare
Bosnia Compare Compare
Botswana Compare Compare
Brazil Compare Compare
Brunei Compare Compare
Bulgaria Compare Compare
Burkina Faso Compare Compare
Burundi Compare Compare
Cambodia Compare Compare
Cameroon Compare Compare
Canada Compare Compare
Cape Verde Compare Compare
Cayman Islands Compare Compare
CAR Compare Compare
Chad Compare Compare
Chile Compare Compare
China Compare Compare
Colombia Compare Compare
Comoros Compare Compare
Congo Compare Compare
Costa Rica Compare Compare
Croatia Compare Compare
Cuba Compare Compare
Curacao Compare Compare
Cyprus Compare Compare
Czech Republic Compare Compare
DR Congo Compare Compare
Denmark Compare Compare
Djibouti Compare Compare
Dominica Compare Compare
Dominican Republic Compare Compare
East Timor Compare Compare
Ecuador Compare Compare
Egypt Compare Compare
El Salvador Compare Compare
Equatorial Guinea Compare Compare
Eritrea Compare Compare
Estonia Compare Compare
Eswatini Compare Compare
Ethiopia Compare Compare
Fiji Compare Compare
Finland Compare Compare
France Compare Compare
Gabon Compare Compare
Gambia Compare Compare
Georgia Compare Compare
Germany Compare Compare
Ghana Compare Compare
Greece Compare Compare
Grenada Compare Compare
Guatemala Compare Compare
Guinea Compare Compare
Guinea-Bissau Compare Compare
Guyana Compare Compare
Haiti Compare Compare
Honduras Compare Compare
Hungary Compare Compare
Iceland Compare Compare
India Compare Compare
Indonesia Compare Compare
Iran Compare Compare
Iraq Compare Compare
Ireland Compare Compare
Israel Compare Compare
Italy Compare Compare
Ivory Coast Compare Compare
Jamaica Compare Compare
Japan Compare Compare
Jordan Compare Compare
Kazakhstan Compare Compare
Kenya Compare Compare
Kiribati Compare Compare
Kuwait Compare Compare
Kyrgyzstan Compare Compare
Laos Compare Compare
Latvia Compare Compare
Lebanon Compare Compare
Lesotho Compare Compare
Liberia Compare Compare
Libya Compare Compare
Liechtenstein Compare Compare
Lithuania Compare Compare
Luxembourg Compare Compare
Madagascar Compare Compare
Malawi Compare Compare
Malaysia Compare Compare
Maldives Compare Compare
Mali Compare Compare
Malta Compare Compare
Marshall Islands Compare Compare
Mauritania Compare Compare
Mauritius Compare Compare
Mexico Compare Compare
Moldova Compare Compare
Monaco Compare Compare
Mongolia Compare Compare
Montenegro Compare Compare
Morocco Compare Compare
Mozambique Compare Compare
Myanmar Compare Compare
Namibia Compare Compare
Nauru Compare Compare
Nepal Compare Compare
Netherlands Compare Compare
New Zealand Compare Compare
Nicaragua Compare Compare
Niger Compare Compare
Nigeria Compare Compare
North Korea Compare Compare
North Macedonia Compare Compare
Norway Compare Compare
Pakistan Compare Compare
Palau Compare Compare
Palestine Compare Compare
Panama Compare Compare
Papua New Guinea Compare Compare
Paraguay Compare Compare
Peru Compare Compare
Philippines Compare Compare
Poland Compare Compare
Portugal Compare Compare
Qatar Compare Compare
Romania Compare Compare
Russia Compare Compare
Rwanda Compare Compare
Saint Kitts Compare Compare
Saint Lucia Compare Compare
Saint Vincent Compare Compare
Samoa Compare Compare
San Marino Compare Compare
Sao Tome Compare Compare
Saudi Arabia Compare Compare
Senegal Compare Compare
Serbia Compare Compare
Seychelles Compare Compare
Sierra Leone Compare Compare
Singapore Compare Compare
Slovakia Compare Compare
Slovenia Compare Compare
Solomon Islands Compare Compare
Somalia Compare Compare
South Africa Compare Compare
South Korea Compare Compare
South Sudan Compare Compare
Spain Compare Compare
Sri Lanka Compare Compare
Sudan Compare Compare
Suriname Compare Compare
Sweden Compare Compare
Switzerland Compare Compare
Syria Compare Compare
Taiwan Compare Compare
Tajikistan Compare Compare
Thailand Compare Compare
Togo Compare Compare
Tonga Compare Compare
Trinidad Compare Compare
Tunisia Compare Compare
Turkey Compare Compare
Turkmenistan Compare Compare
Tuvalu Compare Compare
Uganda Compare Compare
Ukraine Compare Compare
UAE Compare Compare
United Kingdom Compare Compare
United States Compare Compare
Uruguay Compare Compare
Uzbekistan Compare Compare
Vanuatu Compare Compare
Vatican Compare Compare
Venezuela Compare Compare
Vietnam Compare Compare
Yemen Compare Compare
Zambia Compare Compare
Zimbabwe Compare Compare