English is the de facto world language and the third largest language in the world in terms of first language speakers (the largest spoken in the world if you include second and third language speakers). English largely owes this honour to the success of the British Empire and the 'superpower' status held by the predominantly English speaking United States.
However, the two most spoken dialects of English, British English and American English, have key differences:
British English / American English
Crisps / Potato chips
Football / Soccer
American football / Football
Arse / Ass
Bum / Butt
Lift / Elevator
Also, there are etiquette differences: In Britain, when asked for coffee, you'd say 'I don't mind', whereas in America, you'd say 'I don't care'. Either sounds odd to the other.
So, the question is- which dialect is better? I'd say British English, but not just because I'm biased- it makes more sense (ie football is actually a ball game played with the foot), and it's the original.