Just wanted to know what the difference is between them. How close are the overall shape of the exhaust, length, etc.

I'm curious because apexi makes the GT for the 92-96, but not 97+ I have no need for this exhaust rigth now, but for future reference i was wondering what would need to be changed or if it would work at all

http://store.rms-usa.com/apgtspcaexho3.html