You won't see it. Just like for awhile you didn't know if you would get an iPad 2 with the A5 or the A5r2 (it's safe to assume all available iPad 2s now have the a5r2). This is the same thing. It won't be marked on the box and there won't be any difference. My guess apple is just clearing out all of the a5x from the iPad 3 to 4 switchover.