Jon,
The nose is a bit different as well. On one the section in front of the wheel well, below the headlight bucket and behind the turn sig/driving light, is more flat and when viewed head on, hides more of the front tire. On the other it is more rounded (more like the Mk I.) I have seen both front clips together at Lee Holman's shop, but, in the midst of a senior moment, I can't remember which one was the A and which was the B. It would make sense that the A is the more rounded one, but I am not positive.
Lynn
Edit: Just saw the superformance thread here; sorry for being redundant. - Lynn