The new Verizon iPhone 4 landed yesterday and there seems to be at least one huge difference with the AT&T-based iPhone 4, one that's enough to warrant the moniker of iPhone 4.5.
Slashgear got hold of the CDMA iPhone 4 and the reviewer put their hand on the standard "death grip" location and they found out that the device did not suffer the same fate as the original iPhone 4.
They held the device for one minute with only one bar disappearing; they try to cover the "new" top portion of the antenna (see their image gallery here) but the Verizon iPhone 4 still manage to deliver better connectivity than the AT&T one.
What does that mean? Given that the death grip affects other phones on many US networks (including CDMA & GSM), it looks as if the Verizon iPhone 4 is effectively a slightly reworked version of the existing iPhone 4; It would be interesting if iFixit did a teardown of the Verizon model and compared it to the new one.
The other difference obviously is the presence of a CDMA chipset in the new Verizon iPhone 4. Who made it? Only a proper teardown would be able to help us on that.