I have both. Lumia 1520 and now 930. Biggest different is battery life time !!!
1% of battery on Lumia 1520 = 4,33min
1% of battery on Lumia 930 = 2min - ****!!!!
Video playback 3,3hour vs. 7,21hour on lumia 1520.
2nd different, but not problem is MicroSD card.
I will sell 930 and go back to 1520.