ok, i have driven 32 gtst, 33 gtst (both lightly modded), the first 4 door WRX STi to come to aus, a bug eye STi and the latest STi, as well as a manual spec R and a auto Spec S.
Now, firstly the first 4door STi was totally mad, but I had only just got my license and hadnt driven that many turbos hard before it... it handled like nothing before and went and felt very fast. The bug STi handled well and compared to some of the GTST's I went against (see pic below). Again, it handled really well but it didnt feel quick at all... it sounded like a dud (but 10x better than stock wrx). The latest STi has really got back to the roots... it handles like a dream, is farken quick and feels quick too. Have also driven std bugeye and old wrx... the old one was heaps better.. the bugeye just feels way to refined.
the s15's were both stock std aus spec and felt pretty slow, and sounded like shit... although they were hella fun for drifting around every corner i came accross.
the skylines are in a class of their own, as both had zorst and pod filters.... they felt quicker, sounded quicker.... and nothing i think beats the turbo 6. But especially the 33, it is a farken whale of a thing compared too the s15's... (also, s15 has the best interior out of skyline and silvia)
also, Cray Zee Boy, mini cooper s... are pretty slow, but are fun to drive... feels like you are in a really mini when u burn it through the hills.. very sharp handling, a bit scary at times.