Having been spotted in the FCC’s database, the Sony Xperia Z3 Compact does seem to arrive in a couple of variants, where they will be known as the PM-0810 and the PM-0812. While the two variants do look as though they are but the same handsets at first glance, there is a particular difference, and that lies in the list of supported LTE bands. For the Sony PM-0810, it will support LTE bands 2, 4, 5, 7, 13, and 17, which points it to being an international model, while the PM-0812 will only support LTE bands 5 and 7 enabled, marking this out to be a decent candidate for a carrier-specific version.
Regardless, both models have been confirmed in the FCC filing to arrive with GSM/WCDMA/LTE connectivity, Bluetooth, Wi-Fi a/b/g/n/ac, ANT+ and NFC support.