Don't have any comparison shots at the moment, but a co-worker and I did a similar test with his Note 2 and my One (exact same shot taken seconds apart) on the internals of a PC and we both agreed that the One came out on top, for what it's worth. I also did some brief low light comparisons with my Lumia 920 and my One; as far as I could tell they were nearly identical. Over all very satisfied so far with my One's camera. In fact, I think it is better than the 920's camera (although that is probably more software related than hardware related). I have yet to use a S4 but from what I gather the shutter lag would be a deal breaker for me and while it may get better pictures from time to time I think over all the quality will suffer because of it.