Verizon iPhone 4 look a lot like AT&T's iPhone 4, other than the fact that it'll work on Verizon's 3G CDMA network, as oppose to At&T's GSM.
Besides the networks, there's another key difference between the Verizon iPhone 4 and AT&T iPhone 4, a "Personal Hotspot." Yes, the Verizon iPhone will come with this killer feature that will allow it to become an internet hub for up to 5 WiFi devices to connect to.
Verizon iPhone will let you create a personal hotspot and share your data connection via WiFi with up to five other devices, such as laptops or other cell phones. It's much like Verizon's popular Mifi data cards which allow users to share their wireless broadband with other people, and now you can do that with the iPhone, and tether your laptop to it.
AT&T also allows tethering, but you can only tether one other device through a USB or Bluetooth connection. Verizon also supports Bluetooth and USB, but connecting via WiFi is just easier and supports more devices.
AT&T charges extra for tethering. Verizon typically charges $20 a month extra as well for personal hotspots on other devices such as Android phones with that feature. And while there's no word on pricing yet -- but note the "Additional usage charges may apply."
iPhoneClub and iPhoneHellas claim that GSM iPhones will soon gain the Verizon iPhone's "Personal Hotspot" feature.