No difference as far as i can tell. I have ridden all from 04' to 07' and i havent noticed any difference as far as handling. The 05' i rode had a bunch of after market stuff on it and it ran almost like an R6.
I will say that if you have never owned a street bike or had much time on one. I wouldnt go new. Chances are pretty good you will either panic when someone pulls out in front of you (It will happen eventually) and might drop it. Or you might not put the kickstand down all the way and climb off. Either way the first bike always tends to get scratches and dents on it. I'm not trying to discourage in any way, I love motorcycles. But i have been in 3 bad accidents that have almost done me in. All of them from people in cars not caring that i was there.
Sorry about the long story, but i have seen too many accidents not to at least say something. I just want all new riders to remember: wear full gear, learn to operate your machine to the point that it is second nature, and never-ever assume that a car sees you.
Be careful and have fun!:thumbup: