looking at vag-cat, rear subframes are the same on all MK3s. The front subframer has 2 part numbers, one listed for all models including the VR6, and another seperate one for the VR6. Doesnt say what the difference is:
(1) 1H0199200P - engine carrier with rubber mounting
/ ABF,AAA,ADZ, AEA,ADY,AEK, ABU,2E,AEP, AAC, diesel eng.: 1Y,AAZ,1Z
(1) 1H0199200N - engine carrier with rubber mounting
/ AAA