I can't comment on the Epiphone t-birds as I've never played one. The necks on the '60s and '70s Gibson reverse t-birds are thin/narrow - essentially a copy of a jazz bass neck. And, of course, the Gibsons are neck through where the Epis are bolt-on (and I think they did some that were set neck and probably some neck throughs as well but I don't know).
Fair enough. Mine has the chrome covered pickups and chrome surround rings (actually two rings as there are black plastic spacers under the chrome rings) which serve well as a thumb anchor - even that whole raised ridge of the center block serves as a usable thumb rest running the entire length of the body. Of course, this was somewhat accidental and not by design (as was true with Fenders - they were not designed with using the pickups as thumb rests as a consideration but rather, the opposite - to anchor the fingers and play with the side of the thumb like a pick - hence the 'tug-bars' and chrome pickup covers). It really is amazing how much Fender got right from the beginning (and, as is obvious, I would say about the original t-birds, too - which borrowed a lot from the jazz basses but I like the pickups much more) - really beyond arguments about CNC accuracy and quality control, I don't see Sadowsky, Lakland, etc having contributed that much of significance to the overall design concepts relative to the original designs (great basses that they are).