My son also has Asperger's. Was diagnosed when only 3 and is 15 now. I've also had the chance to talk in depth with a few Aspies here at PC.

We both have problems with group situations, interpersonal relationships, and being over sensitive.

Problems that appear to be different include: most Aspies are very concrete, visual, "logical" learners. They have problems with abstract concepts and subjects involving emotion. They can be sensitive, but they don't understand the social norms needed to "get" people. BPD's misinterpret people's reactions, facial expressions, etc. Aspies don't get them in the first place. They often need to be directly told what a person feels or they just don't get it. They also have a tendancy of basing life on statistics, science, logic, etc and have problems with something....relationships, love, etc, don't fit in that type of equation.

I know my stereotype won't fit all Aspies, but I think it's not too bad. I saw a good Aspie thread a while back. I'll see if I can find it, and if you'd like to talk about it, let me know.