As an American I would say there is a very noticeable difference between the two. I have never been to England but have a few English friends when living overseas and aside from the accent differences the British uses words that we do not in America and vice versa. British do not use contractions (like don't, can't, won't). Some British and American words are spelled differently... Ex. color (US) vs colour (UK), center (US) vs centre (UK), analyze (US) vs analyse (UK). In America we have a lot of slang and just overall poor English. A slurring of words, incomplete and incorrect sentences, incorrect uses of words, etc. which is especially true of some teenagers, street kids, low/poor class, etc. I find British English to be more proper, however, due to American television shows, gossip, and fashion, I find more people in Asia learning American English from online and friends while studying British English in schools.

Hi Lena, this Italki site explains all the differences http://www.italki.com/knowledge/page/DIFFERENCES%20BETWEEN%20AMERICAN%20AND%20BRITISH%20ENGLISH.htm

Asides from pronouncing vowels in many words differently, some words may have different meanings. Chips in America refer to the thin potato chips you buy in a bag. Chips in GB refer to the sticks of fried potato you buy at McDonalds. Fags in America refer to gays, or just used as a derogatory term. Fags in GB refer to cigarettes. You may also see different words used in the same situation. In America you would say you "line up" to pay at the grocery store. In GB you would say you "queue up" instead.

In terms of grammar, when talking about completed actions whose time is not determined and which are linked with the present British English uses Present Perfect while American English often uses Simple Past, e.g: Have you heard the news? vs.Did you hear the news? Also, for example for deductions, BE uses must while AE have to: It must have hurt. vs. It had to hurt.

Uhm..yhereis no big difference. I think the difference is on the pronounciation.^-^