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Unfortunately, 930 is simply dull. Both 1520 and 1020 are much more interesting handsets.
About SoC - unless you are playing games on your phone dualcore S4 is more than enough.
Granted: In the US -I look everyday for a 64gb 1020 option/possibility, almost at any cost.If you can get a 64gb version, you'll be happier. 1020 is made for photography in mind. Raw (dng) files (heavy) is what you want the camera to produce.