From a performance point really much better although both run "only" with a 1.7GHz dual-core as my last (the Padfone). the Xperia SP works with the more modern and it shows simple, it misses everything. Benchmark results are very positive. Sometimes it even exceeds the Nexus 4 for everyday use is absolutely sufficient. For modern games also. only those who want to have the best results in umbedingt benchmark probably have to spend more.
Camera is good mediocrity, not relevant to me have for my DSLR. In low light it gets bad, in good light siehts very nice. some nice filter there is also so for the snapshots isses certainly useful. Camera Button I also find convenient.
Display, often visted here on the black level, which I find to be wrong. Yes the menu button which appear common with black background work here really milky gray. but that is not on the screen but on the software! The display can better represent black. The same problem also Xperia Z and ZL and Dennen was the fixed with an update;). Clear the black level is not comparable to AMOLED displays but not as bad as it is displayed by other people here or there the first impression. The best times to go to the Gallery, and some display with black on the edge when the menu buttons from the image disappear wirds good black in the area. Therefore, it is not on the display.
It's not the easiest with 155gr. but it is not too difficult, such as a Lumia 820. The aluminum frame can look very sophisticated but it is not at first glance be clearly identified (in the black version). The battery cover scließt not everywhere perfectly as you would want but that's nagging at very high levels.
Battery life can be combined with various tricks extremely what rausholen so far I can say this much after 15h I still have 54% battery. So should come over one day really be a problem.
Kann recommend. Find the phone on the market although they have logically as one of the 5 "Highends little more power, which one does not really need.