i realize this is an old thread but i needed to corret some things

Actually there a quite a few thigs that differ between 3rd and 4th gen 3sgte's

The Big Ones:
You mentioned:
1 - turbo
2 - compression
3 - boost

you didn't:
4 - intake manifold
5 - No distrubutor
6 - Top feed fuel rail and better fueling
7 - and it supposedly has a much better and stonger awd tranny that the st205

8 - not to mention the motor is generally 5 years newer