1.in spelling words from the american and english in spelling of the word of two main ： is a change made to individual letters words, one american words are more streamlined. 2about date for example 1996.3.2 english 2nd March,1996 american english March 2, 1996 in short,American English is much more popular,it's more simple ,easy and accepet by the pelple all around the world.The standard Britian English is different to pronounce,compared to American English.and the spelling of American English is also more simple. the history of Am.E is not so long as Br.E. what`s more, both american english and british english borrow some foriegn words, so that there are some diffrences in words. however the differences in pronunciation are eminent.besides, you can find more differences in spelling and grammar.

This site pretty much covers it all, examples galore :) http://esl.about.com/od/toeflieltscambridge/a/dif_ambrit.htm