Compare Stock SH3 vs. Stock SH4, I would choose SH4. That being said,
SH4 is not GWX, but will improve big-time with the next patch and an eventual super-mod. With regards to a super-mod, this is being talked about already.
Lots of great mods for SH4, even this early in the game. Still have GWX on the computer and will continue to play it as well
RDP