If I am looking to bring over a motorola g6 phone and RW requires 1925-6, but this phone is 1925-13, would that be compatible.
No, as that isn’t on the list.
Republic Wireless requires that the phone be a US factory unlocked model. No dual-sim international versions will work, unfortunately.
@jumphour is correct the 1925-13 model is the Brazilian version and will not work on Republic