Porsche 964 - Can C4 be as good as C2 and is either as good as real RS?

Aiming to settle once and for all the age old question of Porsche 964 C2 Vs C4 and is the RS any better? We took a modified Porsche 964 C2, lightweight 964 C4 and a genuine 964 RS and took them for a test drive to see what was what!