My CBR is putting out 167 hp and my Hayabusa is putting out 159 hp stock. The Hayabusa holds the power longer, with a much better torque spread, which really helps in roll ons. But if you start the roll on with the 1000 at or near it's torque peak and in the middle of the hp. ramp plus it weighs 100 lbs. less than the Busa, you are going to lose. We are not talking about an all out hold it at top speed run. But, a roll on from 60 mph w/both bikes in 2nd gear? My money is on the CBR, GSXR, R1, ZX. These 1000's will hold the advantage in a race like this all the way up to 170 or so with the same size equal riders on board.
For this reason, my Busa will be getting cams, a custom map and an exhaust system once I make up my mind which one I am going to get.