The answer to this question depends on whether you're talking about pre or post facelift Jspecs. After the facelift the RZ was manual only, had big wheels & brakes, LSD, uprated ABS & suspension, Recaro seats etc. The RZ-S was manual or auto, and these things were not standard, they were optional. The GZ doesn't exist after the facelift.
Before the facelift, the GZ was auto only (with LSD), the RZ was auto or manual, with the LSD standard on the manual and optional on the auto. Both had small wheels & brakes as standard with the bigger ones as options.
This is all assuming you're talking about Jap cars.