I've seen a few thing with Steve and Bill being interviewed together. They seem to get along great, great senses of humor from both. I thought it was pretty cool.
I think most of it comes from the mac side, since they are always comparing themselves to windows (never linux or other OS) and the fact that most of their ads in the last 20 years were about mocking the PC. Just like jobs hates the fact that MS still dominates ober 80% of the OS market;-) They're both close to their 60s, they cant go "your momma..." in front of the camera anymore:lol: