yeah thers heaps or difference.
torque r32 353Nm
r33 368Nm
r34 392Nm
Turbos:
ceramic on r32 & r33 steel on the r34
normal bearing on r32 & r33 ball bearing on the r34
Intercollers:
thicker tubes in the r33 than the r32. even thicker in the r34
Dump pipes:
bigger capacity on the r33 than th r32. even bigger on the r34
cam:
same on r33 and r32. altered duration and lift on the r34
head:
r34 has a recast cylinder head wich is slightly different to the r32 and r33
diffrences are extra ribbing to give greater torsional strength.
thats all i can think of. there are other differences if u look at the N1 models.
hope that answers ur question.