Are the R32 rears,GTI front brakes then? If you get what I mean?
I think I get your question - but no is the answer.
The front wheel drive GTI / Edition30 / Seat Leon Cupra / Å koda Octavia vRS (all from the PQ35 platform) all use identical specification rear brakes, being solid discs, 286mm diameter by 12mm thick. They are clamped by a Lucas/TRW CII38HR-A caliper, with a piston bore of 38mm.
Whereas on the identical platform four wheel drives such as the R32 and the S3, the disc is a centrally ventilated one (just like the fronts), and is 310mm in diameter by 22mm thick. A different type of Lucas/TRW caliper is used, namely a CII41HR-A - I'll let you guess the piston size!
Now, on the "lesser" 4motion models, such as the Golf TDI 4motion, the caliper is the same CII41, but the disc diameter is both smaller, and non ventilated.