As both cheetah and GreenEnvy said, the '05-'07 ZZR is the same bike as the '00-'01 ZX-6R. But we don't get that bike in Australia. Kawasaki isn't bringing it in because they feel that the ER-6n/f fills the role adequately.
In Oz, we got a carbied 636cc version of the ZX-6R in '02. '03+ 636s are fuel injected and much more serious sportsbikes.
Also, the '90 - '05 ZZR600 in Oz is a totally different bike to the ZX-6R. In the North America it was sold as the ZX-6E. It's much more comfortable, smoother, physically larger, has a centre stand, etc.