The Verizon variant differs from the Sprint in that it is fully unlocked to work both on the ATT and T-Mobile networks. You likely will be unable to get LTE though using ATT based networks, except for in a very few areas. Your overall coverage won't be quite as good as using a native ATT phone although it should work in most places, and most of the time you'll be on HSPA+. If you were to use the phone on a T-Mobile based network you may find more places with LTE coverage although you'll still be restricted to T-Mobile's less robust nationwide coverage.
One other big difference between the two variants is that the Verizon one includes Qi wireless charging whereas the Sprint variant does not.
Both phones sport a 5.2 inch 1080p HD IPS display, with a 3000 mAh battery, 13 MP rear facing camera with optical image stabilization, a Snapdragon 800 2.26 GHZ quad core processor and a 2.1 MP HD front facing camera.
If you're interested in this deal, hit the button below and grab one while they're still available. The Verizon variant is currently only available for in store pickup.
Updated: 5/7/2015 The ATT variant is also for sale for $174.99, and you'll have to select replacement phone to see that price.