I have two 96 MK3's one's a GTI 16v the other's a vr6 both 5 door, both Dragon green.
The GTI has arches the VR6 is arch less with colour coded smooth bumpers etc.
Without doubt the GTI looks far better.
Having had a 96 GTI 8v 3door in the past that I made the mistake of removing the arches on all I can say is sometimes its better to not know whats under there and leave well alone.
