Verizon version of HTC One is horrible. This is my Second Verizon HTC One too. I still have my HTC One from Sprint, compared it both phones side by side in performance, camera quality, screen quality and sound quality. The first thing I noticed is that the Verizon HTC One's boom sound is dumb down. There's no bass and the volume is quieter even when both phones are on the same volume level. Next was the Camera Quality, definitely you could tell, just by looking at it the huge difference between the phones. Verizon once again made the camera quality looked so crappy because of this reasons: Auto Focus is not "Auto" focusing at all unless you do it manually (duh), Colors are washed out, Black levels are washed out way beyond that if you placed both phones on a blacked out area (where you literally just see darkness everywhere) you'll see that the Verizon version of the HTC One has this glowing washed out black level around the screen. Next is the screen quality, there was a tiny difference between the two phones, Verizon's whites are yellowed (actually it goes with other colors too but it's barely noticeable). Now the performance, the Verizon has a 4.2.2 android version, while Sprint has the 4.1.2 version. Though both phones are the same in terms of hardware and components, Sprint's HTC One performed the best. Just on moving the screen, scrolling up and down, you can tell that the Sprint's HTC One is a lot smoother. I used this program called Quadrant Standard, Sprint's HTC One averages on 61fps and did not have drastic changes in fps on any section of the test. The Verizon's HTC One, however averages a 59fps and had drastic changes in fps on 3 sections of the test. It went from 59fps to 37fps and it was running 37fps on the last section of the test.
here's a link of a side by side camera picture i took with both phones:
Sprint HTC One vs Verizon HTC One - Imgur
here's a link of a side by side camera picture i took with both phones:
Sprint HTC One vs Verizon HTC One - Imgur