I'm due for an upgrade Saturday, and I'm between the S4 and the HTC One. I was more heavily leaning towards the S4, I really like multi-window, and the ability to swap batteries/memory cards on the S4 though. I don't see myself taking low-light pics, so not sure I'd need the One's better low-light pics, and I don't see myself using the eye tracking on the S4 (maybe the hover touch thing). Does anyone miss the ability to replace the battery on the HTC One? Does it make it harder to get a case on it? Also, does the back scratch as easily as certain other non-Android phones are apparently prone to?