I have owned and tracked and ridden both for at least 10,000klms each so I have a small idea in my own little way
ZX7 is about 195kgs Dry, with about 120hp at the back wheel for a good en.
05 ZX6R is about 165kgs dry, with about 115hp at the back wheel for a good en.
ZX7 is truck like solid on the road and shopping trolley vague on the track
ZX6 is fast steering on the road, and rock solid on the track
ZX7 is long in the wheelbase and heavy to steer with a racer ride position
ZX6 is short in the wheelbase and light to steer with a racer ride position but bars are closer so a little less weight on the wrists
ZX7 brakes have nice feel but lack outright power and no slipper clutch
ZX6 brakes are so progressive in feel with massive power that is easy to control and a slipper slutch that lets you exploit this.
ZX7 was best looking sports bike of it's day IMHO
ZX6 is best looking sports bike of it's day IMHO
Tyres are 180 for ZX6 so SS ruber is plentiful, ZX7 is 190 rear so not a lot of tyres avail (although 2006 may be a different story with 190's being run i bet)
Hope this helps.
