It's not my "first" sportbike. I've had sport bikes in the past, but that was several years ago. I've looked at a lot of bikes. Not interested in a sport touring, a generic street bike, etc. Looking specifically at the bikes listed. My friend has a Hayabusa -- nice bike, but I don't care for the looks (or at least I like the ones listed better).
While the performance is about the same (I'm not racing so I don't care if one is slightly faster, etc.), all bikes are different as far as riding position (some have the weight more on the legs that the wrists), reliability, and overall feel.