Edwards, Tokai, Orville and Japanese Epiphones are, as far as I know, all solid bodied. In my experience Edwards tend to be quite light, Tokai a bit heavier.
I suspect it's not that they have access to "better" mahogany, more that they use different woods from different sources and different branches ( :roll: ) of the mahogany "family".
Going back further to the late '70s and '80s, I know some of the Greco models were chambered/weight relieved - although they still tend to be pretty heavy. The same is probably true of Burny, but I don't know for sure (can't be bothered to research it again now! :lol: )
The new Chinese Burnys are probably solid, but I'd guess they're made of nato or something along those lines.