I had an FZ6, somewhat lighter than my FZ1 but (I know were talking about R6 not FZ6 - bear with me), from personal experience the two bikes are like night and day with respect to power. I had a SV650 hated it, do not like the V-twin, also had a ZZR 600 for 11 days before it was crushed by a pickup turning left in front of me. There is no comparison in my opinion with respect to raw power for a 600 vs. a 1000. Currently I have a 06 FZ1 and a 06 GSXR 1000. While the GSXR is lighter and faster in acceleration as well as top end, it doesn't completely run away from the FZ1. I know the GSXR 1000 would smoke an R6 on the track as well as the street, it is a very flickable bike also, but with my lower level of experience I am much more comfortable on my FZ1 than on the GSXR, it is very squirly on corners compared to the stability of my FZ1. I think the R6 is a great bike, but I was going to spend the money after have a liter bike, I know I would by an R1 before an R6. Our beloved FZ1's are built for comfort, power, cruising and twisties all in one package. My son has a 2000 R1 and after riding the R1 or the GSXR 1000 I am happy to get back on my FZ1 may have something to do with being 62 and looking for a comfort zone without neck pain or arm and wrist fatigue. After all is said and done most of our time is spent driving around the city or country not the race track. Hence, comfort is important to me. When I get the need for speed, I just go ride the gixxer around for half an hour go home and take a couple of advil for my neck and wrists. The rest of the time my wife rides the Gixxer and gets a charge out of kicking my behind on the interstate, but I really dont care, cause I love my FZ1. Thats my 2 cents worth.