We have some differnt slang term's and some differnt spellings. The accent is differnt too, but chances are youll be stuck with a Russian accent anyways, and it isn't like differnt parts of the US don't have differnt accents. You will be understood in both country's either way. I would probally just pick which version sounds the nicest to you, and what you will be using more.

Check out this link

http://esl.about.com/library/weekly/aa110698.htm