Teardown update: We got ahold of a Verizon version of the Moto-X and played a little game of 'spot the difference' with the motherboard:

SanDisk SDIN8DE2-16G 16 GB NAND Flash replaces the Toshiba

Samsung K3PE0E00QM-CGC2 2 GB LPDDR2 RAM instead of SK Hynix

The Verizon model adds another Qualcomm modem, the WTR1605 (in addition to the WTR1606L, possibly used solely for LTE support on this model)