I know top speed isn't as big of an issue with these guys anymore .... its more about the 1/4 mile now. BUT ... I seem to remember the ZX-12R having about 10 more ponies than the Busa and not being able to beat it on the top end nor at the 1/4 mile strip because of it poor aerodynamics. Heck, not even the original ZX-14 was able to put up a higher top speed than the Gen-1 Busa when Sport Rider de-restricted both.
The Gen-2 Busa is supposed to be more aerodynamic than the Gen-1 and the ZX-14 fell behind the Gen-1 Busa, the Gixxer 1000, and the ZX-10R. I don't see how, with 2 or 3 ponies more than the Gen-2 Busa, it's gonna be able to put up a higher top speed. A better 1/4 mile time ... maybe ... and that's a big MAYBE! But top speed ... I doubt it.