- bonnet (hood) - there is the old style hood on 1.8 16V's and G60's and the late-style hood found on VR6's, 2.0 8V's and 2.0 16V's
- the VR6 arches (wings) are wider than the G60s
- different front headlights
- different wheels options
- different interior design (dash, steering wheel, etc)
- different fogs&turn lights
That's all i can remember...Anyone else feel free to correct/update list
In regards to what Ben said, i think each motor type has its advantages and misadvantaes...For the highway and long journeys a VR is better, but inside city you can't beat a nice G60