Earlier quoted context omitted.
British English : Americans :: American English : Brits
There is only a common spelling difference in the written sense though. An American would not fully understand someone from Yorkshire speaking Yorkshire dialect, nor would they understand someone from Merseyside, Glasgow, etc. if they were speaking in their dialect. I'm from Yorkshire originally, my dialect is totally different from those in Merseyside or the North East (for example.) How we speak and how we write is…
I don't know. Should we table this discussion?
(Noting that some words, like "to table" have the opposite meanings in British and American English. When Americans say "table" the British say "shelve" and when the British say "table" the Americans say "put forward" or "propose.")