Cycle World August just did a detailed track analysis on these Superbikes, and unless you are a Pro-rider, really it is so close you will only have bragging rights.
Here is the data:
1/4 mile;
Aprilia RSV4 = 9.99 @ 143.08
BMW S1000RR = 9.87@149.89
Ducati 1198=10.08@143.00
Kawasaki ZX-10R = 9.97@146.32
Hp:
Aprilia = 155.7@12,070rpm
BMW = 179.5@12,760rpm
Ducati = 150.3@9,820rpm
Kawasaki = 165,5@11,800rpm (US bike restricted)
Best lap times achieved Inde Motorsprts rancg AZ:
Aprilia = 01:54:29 and terminal speed 140.6mph
BMW = 01:54:11 @ 148.7mph
Ducati = 01:55
@ 137.9mph
Kawasaki = 01:54:65 @ 142.3mph
Ducati 848 EVO = 01:56.05 @ 127.7mph
Suzuki GSX-R750 = 01:55:34 @ 135.1mph
Triumph Daytona 675R = 01:55:58 @ 128.7mph
Kawasaki ZX-6R = 01:54:65 @ 129.6mph
Suzuki GSX-R600 = 01:55:72 @ 128.1mph
Bazzaz GSX-R1000 = 01:54:23 @ 140.6mph
Moral of the story is if you has a 1000 Gixxer with a pipe and a Bazzaz, you would of sat right on the Beemers butt and with a 750 Gixxer stock factory you would have lapped faster than a Duc 1198.
Also, the 1/4 mile times posted are not better than I have seen for a Busa, they are all very close.
For hp and top end the Beemer is king for now, but I don't think that will be for long.