new mkII TT is same stud pattern as mk5 golf at 5x112 i think
original TT is 5x100 which is the same as mk4 golf
becareful on replica's though i.e. those with dodgy polished lips, maybe heavier, softer material and not as good finish.
original looks ace in real, as the rear ones are .5" wider i think or something like that and has a slightly dished effect on the rears
good luck