GTS-4 Computer Question

I'm getting ready to upgrade injectors and turbo and will probably need a stand alone or at the lest a chipped computer. my question is, is there anything special or different about the gtst and gts4 computers, or can i mix the ECU's. i can find all kinds of junk for the gtst's but nothing for the 4's. a web page or just a few words would be greatly appreciated.

bump for myself

wow you guys are really interested on answering a simple legitamate question *extreme sarcasm*but everyone on this board will jump on the same B/S question that every kid and their mother wants to know (Lame). Guess you just want to seem smart cause someone already answered your question for you.

Answer my question and be called a reall enthusiast not a chump