Camera
Icon: 20+MP
830: 10+MP
Display:
Icon: FullHD
830: HD
Storage:
Icon: 32GB
830: 16GB + up to 128GB removable storage via MicroSD
Battery:
830: 2200 mAh
Icon: 2420 mAh
My two cents: Both are great phones but I think the 830 is more practical.. Removable storage, almost the same battery size but the 830 has lesser pixels to light up so it will probably be more battery efficient than the 930, 10MP camera is really nice for everyday use
If you want the Icon, I must say just get the 1520 since specs are the same but the 1520 has a much better battery life and removable storage.. But if you don't need the extra storage, the Icon will suffice. I really like the design of the Icon.