Well I actually have a lot to say on this topic because my best riding buddy has an 04 1000RR and we have went at it QUITE a few times. Now this is not a very fair assesment because the size difference between is is VERY drastic but the bikes are modded just about the same way. I will list all our details here for you guys to pick apart.
Him- 2004 1000RR with a Yoshimura RS5 Slip on exhaust, BMC air filter, and a PC3 Usb power commander. Stock tires. He is about 5'8 and about 180-190. Been riding for 19 years.
Me- 2003 GXS1300R with Yoshimura RS3 stainless slip ons race baffle, Marble Mod, Pilot Power tires, PC3 usb power commander but I am running the stock air filter. I am 6'2 and 300 lbs even. I have been riding for 3 years.
Now that you guys know the situations here is what I have found when we are going at it. I feel that the CBR is a very underrated motorcycle. When it comes to the twisties he can pick me apart. I am sorry I am not a crappy rider but the Busa is just a monster to rail through the corners. It handles well don't get me wrong but the CBR is just a lot more flickable. Acceleration wise (in our case remember the size difference) my busa usually gets a small lead on him in first, then slightly more in 2nd, now right after I hit 3rd he will pull up and begin to pass me, 4th he has about a car links distance ahead and then slowly I start to reel him in at about 140mph, then after that I start walking on away from him but not by a DRASTIC length. So basically we are about even until we get to the top end of the speed band and then its like his bike gets a little weaker in producing power than mine does. Now I have rode his CBR before and my actual hands on experience with the bike was this......
It was a very smooth bike. Acceleration was right on, tranny shifted smooth, not as much foot peg vibration as mine (my busa vibrates the SHID outta my feet), Very flickable, and I did not care for the riding position. Very forward angled and I don't like that. Now here is what totally turns me off about the CBR. I have done services with him on the bike and put a couple mods on it with him. This bike SUCKS to work on. Everything is a pain in the arse and NOTHING is conviently set up. The only thing I like better about his bike compared to ours is the idle adjuster is located without propping the tank or removing anything. Other than that even changing the oil is pain. Overall I would give this bike about a 90% out of 100 grade and it would be 95% if the maintenance wasn't such a pain. Also the only other thing I don't like is a VERY uncomfortable seat. Great bike though.