Guessing you don't speak Italian, but this video should give you some idea of the visual differences at least... https://www.youtube.com/watch?v=CZoneBqMvD0 htt

Guessing you don't speak Italian, but this video should give you some idea of the visual differences at least... https://www.youtube.com/watch?v=CZoneBqMvD0 https://www.youtube.com/watch?v=CZoneBqMvD0 Also, don't know how accurate this site is, but perhaps this will be of some use... http://versus.com/en/sony-xperia-z1-compact-vs-sony-xperia-z3-compact http://versus.com/en/sony-xperia-z1-compact-vs-sony-xperia-z...