I've only extensively driven a B3 VR6 and though 'fun', it just didn't feel nimble like the Corrado (driven 4-5 times). The B3 was fudgly looking without front grill. I haven't driven a B4. Only other Passat I have extensively driven was a 1.8T B5 :|
Why a VR6 Passat and not a usual MKIII 2-slo Golf or something (found under or near your asking)? Parts are plentiful as well... not as sure with the B4. You feel the need to give them something imitating performance with a VR?
Take my comments as drivel until someone knowledgable about the B4 VR6 steps in heh.