I ordered both as well. The one I don't keep I will flip and maybe make a couple bucks. Anyway, my first thought is the VZW one. Why? Because the VZW one has all the AT&T GSM radios (sans LTE) as well as the CDMA. **IF** (big IF) the VZW one will work with my AT&T SIM (I know it will outside the US but inside the US is questionable) then I have the best of both worlds. ATT faux 4G (non-LTE HSPA+) gives me around 5-7MBps so with the VZW one, if it works, everything is covered. "Technically" it should work but whether VZW locks out ATT towers in the US as they do on the iPhone it might be the problem. YES, the iPads are unlocked and unsubsidized so it should work but a neighbor of mine who is a VZW mobile engineer (designs and works on the towers) did some checking at work and while they are not 100% sure they think it will not work IN THE USA with an ATT SIM (like the iPhone 4S) but will outside the USA.