Brainy wont let me ask so
Btw 17 points will mark crown

Answer:
some reasons the GDP may be different are...
the countries differences in population,
the country's physical capital,
the country human capital,
the countries technology.
Explanation:
Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!