The answer is simple - BOTH. In the twistie-bits, the 600 is nimble, powerful, gets it's power to the ground with refined manners...STOPS on a penny, and stencils a smile on your face, that can't be removed!! Wehoo! :grin: In the twisite-bits, the thou is a little less nimble, but more powerful, and stomps it's power down on the ground like a petulant punk kid throwing a tantrum...and STOPS on a 50 cent coin. The smile contorts your face till it hurts. If i was to race myself through a long twistie piece of road on both these bikes, and was on the 600 but behind the thou, I'd never be able to pass myself, even though I'd be able to keep up. Andf I was on the 600 in front of the thou, I'd be able to keep myself on the thou back there behind me. If I was on the thou and behind myself on the 600, I'd be tempted to try and squeeze past in the short straighter bits between corner, but I'd need to be brave and hope that myself up front on the 600 was in an agreeable mood. Only with a bit of a straight where I had a little more room to use the brute force power of the thou, could I shoot past. And If I was on the thou ahead of myself on the 600, I'd be pedalling my legs up my arsk, to stay ahead...having to rely on the power to squirt me ahead, every chance I got, when the bike was upright. The CBR1000RR has longer legs, so it cruises to and from your favorite playground with less fuss, and you might not have to change gears quite as much on the way. Yet the 600 is slightly more comfy overall, when you're flat out knackered, and just wanna get home, because you don't have to worry about the excess power, that might bite you when you are less up to the task. I've ridden them both pretty hard over the same piece of road several times now...each is as good as the other but gets there in a slightly different way. Obviously, the thou is quicker in a straight line and gets the front up anytime any place, all by itself, so if you like to ride like a hoon on the way down to the Sat morning latte session, and your skill can't match the 600d's finesse in the corners, then that's probably the one for you. Either bike will forgive your lack of experience and prowess behind the bars, and then reward you immensly once you do...put up with your mistakes, and keep you safe providing you don't step too far beyond your abilities. I'd put the 600 ahead a little bit, under these circumstances. Assuming the riders abilities are similar... CBR600RR owners can relax...in the twisties you have the thou under the gun...but forget trying to out-power it. CBR1000RR owners - Don't get cocky!...your Thou can eat 600d's for breakfast while you are vertical...any other time, you'd better have your game face on!