The only thing that AT&T iPhones can do over Verizon’s is simultaneous talk and data. Otherwise Verizon has the better offer. Unlimited data, like I currently enjoy on my Droid X, 3G Mobile hotspot available (probably the same deal as the Droids) and Facetime over 3G.
But with LTE devices around the corner, will the iPhone do as well as analysts expect? My guess is it will. I know a lot of people who suffered with AT&T when the original iPhone launched and have been suffering for years as they upgraded their iPhones with bad service. But they wouldn’t give up their iPhones.
Disclaimer: Own AAPL and VZ