JBooth, congrats on your first post.
If it wasn't sold as a BG7TBL, my thinking is, it very likely isn't one.
A product could end up with a PCB that was literally copied from BG7TBL, but populated with different parts, that might have issues, like for example, those (vendor name omitted) OCXOs that in 2016 were supposed to be crushed but ended up being sold to people. Or ublox gpss that were sold as M8Ns but which actually were an M8 series but lacking a TCXO, and flash chip, so not firmware upgradeable and not really an M8N, more of a franken-ublox.