That said, I've scrutinized the photos from the iFixit teardowns of both the iPad 2 and iPad 3, and darned if I can see any significant differences. The metal shield around the camera appears to have grown a spring-contact on the iPad 3 to improve contact with whatever it touches, but that looks like it. And it would be very in keeping for Apple to use the same part for both iPad 2 and 3 if they function the same way. The logic boards of each of the two even have their various connectors to the screen and speaker arrays in the same spot.
So: inconclusive. Maybe we'll luck out and an iFixit staffer will compare and contrast the parts for us.
Replacement iPad 2 front panel (digitizer) is the touch panel portion of the display assembly. Includes replacement iPad 2 adhesive strips to make any cracked, broken, or shattered screen or digitizer repair easy. Compatible with all iPad 2 models: CDMA, — 6 available at 94.95 each.
Touch portion (digitizer) of the display. Use to replace a cracked, broken, or shattered digitizer. Compatible with all 3rd and 4th Generation iPads (all Retina iPads). — 8 available at 94.95 each.
iPod Fix It