Well I had an S4 and now have a MAXX, so I will weigh in on this. First I will say they are both real good phones. The S4 has lots of nice features like the sensor that lets you do things with out actually touching the phone and the ir remote control, but if you run these nice features they eat the battery alive, and for the most part they are gimmicky features anyhow that just seem cool but don't usually get used in everyday life. The differences in the screen resolution to me at least don't seem to be very noticeable in this size screen. The camera is slightly better on the s4 and does have a lot of nice features including the anti shake to help take clear pictures. The MAXX is slightly heavier but personally I like that as I always felt the s4 was to light and therefore felt like a toy. The build quality on the MAXX is better in that it feels better in your hand I doubt that either one is actually any more durable then the other. The very close to stock version of android on the MAXX is very nice since it means there isn't much need for messing with it to make it work the way it should have all along. So over all I personally feel the MAXX is the better phone, for that matter of all the phones I've owned so far this is my favorite of all time.