Has iFixit tore one down yet? I'd wait to hold judgement about if there are any differences until that has been done. Seriously even if the OP was joking I bet there is a chance that it could indeed have subtle differences internally.
Um, there are reports now that it's slightly thicker and has a modified camera lens and proximity sensor.
So it DOES look like it may be different than the black 4 in some ways.
Crow is served below:
http://www.appleinsider.com/article...ns_reveal_modified_lens_proximity_sensor.html