I have the CSL dictionary as well as an ASL dictionary. While many of the signs are similar, there are also many differences - one I can think of off the top of my head is the sign for "rude". When interacting with people in the deaf community, some use strictly ASL, some use CSL, some use a combination of both and some use signs that are evident in neither (these signs are more 'regional slang'). It stands to reason that CSL and ASL have variations because spoken english in the US and spoken english in Canada also have variations. For example, in some areas of the US it is common to say, "sofa" and "soda" and "bubbler" whereas in areas of Canada it is more common to say "couch", "pop" and "water fountain". In my ongoing quest to gain fluency in sign, I am often asking deafies, "Again? That sign don't know, fingerspell please?" and sometimes they are asking me the same thing haha.
