With today's announcement of the Verizon iPhone, a video that was pulled few week ago has resurfaced, showing an updated design of the internals. Although the video questions if this is the iPhone 5 or CDMA version, the answer is now clear that this is the Verizon iPhone 4.
In other related news, some users noted that the Verizon iPhone 4 case and existing bumpers won't fit correctly, due to the mute switch placement. A Apple spokesperson said that Apple will be slightly updating their iPhone 4 case to support the Verizon version's new volume control placement too. No details on when this change will happen or if the update already happened today.
Also, the Verizon iPhone 4 has a different antenna design than the GSM version. Below is AT&T's design with the breaks in the antenna on top:
And, here's Verizon's, notice the antenn on the left side, instead on top: