Both bikes get our vote.
We were so impressed with the power figures of the 636 that we thought we ought to see for ourselves just what sort of bhp the thing delivers at the back wheel. So off we went to see our mates at Black and White Bikes in search of some real life power and torque figures. Once we had strapped the ZX-6R down to the test bed, and helped Paul locate a pickup for the rev counter on the dynamometer (actually I think we just got in the way while he located it himself), the little Ninja was fired up, warmed up, and then given a right good pasting.
After a few power runs, the best reading we saw was 115bhp, so we asked Paul what he made of it.