Outside of the mobile Hotspot on Verizon's version of the Apple iPhone 4, and a few minor cosmetic differences, both GSM and CDMA models are the same thing. That is the gist of the latest commercial for Apple's touchscreen device. Face Time, web browsing, the App Store, reading a selection from iBooks-it is all the same regardless of which of the two carriers you select. The tag line is "Two is better than one" and for Apple, this is certainly true when discussing revenue stream.
Enjoy the peacefulness of the truce that currently exists between AT&T and Verizon because you know that eventually it will degrade into a "Our Apple iPhone is better than your Apple iPhone" mentality. It's just the nature of the beast.