I've never driven a TT, but have helped my roommate with an RB25 swap into his S15. It was fun driving that thing...light weight, on/off twin-plate clutch, no power steering. But the power delivery was totally different. It really wasn't much faster than my n/a, but you would floor it and get that turbo "kick" that made it such a blast. Whereas my n/a is so linear, it begs to be revved...power all the way up to 7200.