It Doesn't Seem So
Originally Posted by pointystar
Besides CDMA/GSM capabilites, is there any difference?
I did a manual update AT&T model a few weeks ago and much to my surprise when I took the battery out, the white ID label on the inside was removed, and etched into the body of the casing was " i747/T999"
After spending sometime reading what was in the US forum, it seems that basically what you can do with one in terms of flashing & rooting, you can do for the other.
I guess it stands to reason too that you can "probably" flash one firmware over the other (after doing a SYSTEM format through custom recovery, that is!!!) with out any complications. But hey I'm still learning just like everyone else.
What I found too after digging up in the developer menu, is that the data radios (850-AT&T &1700-Tmo) were all built in, but they can't be changed unless the proper APN settings are already in
I think it was a pretty slick/smart move by Samsung, seeing that the US versions of the original galaxy S and S2 were so completely different.