I love my ZX9r, not uncomfortable at all for me. That's a very nice 12r your mate has, seen it at Hunstanton a few times I think, mint bike, I still prefer the 9r's though myself.
I find my GSXR very frustrating to ride on the road, it wants to be ridden fast, but our roads are in no state to do so these days, and way too much traffic. I find the power intoxicating, and love it when I get a clear run on some twisties, but think my time with it will be short lived sadly.