ZXR750 vs ZX7R

Hey people,
Might be asking a dumb question but it woudn't be the first time.
Looking into getting a track bike and the 750 sports Kwaka seems a really good option. So my question is, what is the major diff between the ZXR750 (94/95) and the ZX7R?? Was it just a name change or are we talking big changes. The older ones are obviously a bit cheaper so I am just trying to open up my options...
Thanks,
Stew
Might be asking a dumb question but it woudn't be the first time.

Thanks,
Stew