Gen 2 GS-R's have VTEC on the molding, and the moldings match the body color of the car. However, a lot of people paint those moldings to match, so you have to watch out.

If you pop the hood on a GS-R it should say "DOHC VTEC" I dont know what the other models say...

1.7L's are only in the Gen 2 GS-R, 1.8L's are in the other tegs.

Gen 2 GS-R's redline (along with all other GS-R's) is at 8000, RS/LS/GS are at 6500 (or around there, not sure).

GS-R's also have the LED brake light on the spoiler.