Old m3 had intrax controversy set-up properly. Current one has electronic damper control, so can be stiffened up with a button in the cabin. Hard to say what is best.
Old one was on Michelin PS2 road tyres, new one on Michelin Pilot sport cup+ (more track orientated, plus stiffer side walls).
Steering rack on new one is faster.
New one feels ridiculously stable at high speeds, but geometry is still set standard, thus no aggressive front end. Good turn in, tends to reduce straightline stability.
Will let u know when i get a chance to push it.
Power wise, it pulls much stronger than the previous one, especially after 100mph.
Cheers
RW