I have an S4 and a new Alpha... now i love the quality build and size of the Alpha...main reason i purchased this Alpha due to its looks.It is faster than my S4 ..the screen resolution s4 1080p to the 720p on the alpha ...now its barely noticeable if im gonna be truthful so for the basic user you would not really tell. The only big issue i have with my alpha is the speaker and mic.......now on the S4 its superb ...load and sounds really good...on the alpha it comes across not as loud and slightly tinny....also the mic on the alpha is not a scratch on the S4 specially noticeable using social media apps like watsapp voice chat...i can barely hear what ive said on the alpha and sound mono... where as on my s4 its superbly loud and sounds right... not sure if its because theyve positioned the speaker on the alpha at the bottom instead of the back on the s4s unless its a software or hardware problem... running on 4.4.4kitkat. but other than that the alpha is a superb handset right size...feels good and one hand useage is not a problem... hope this helps..