True007 found:
sidewalls
sidepipes
rollbar
license plate
rearview mirror
I'll add:
Trunk lid "point" is gone in #2
One exposed trunk hinge appears to be missing
Nice idea. I also really enjoy the "identify the mystery Cobra" posts. Anyone got pics of a Cobra they challenge people to identify? (except Brent, of course!

) That tells if we can really spot the visible variations from one manufacturer to the next.