Imho, the thickness and bracing of the top have much more to do how a guitar is going to sound, regardless of any overall weight factors related to the rest of the instrument.
'70s Westerlys in particular are often noticeably heavy, but their tops are typically quite thin. In contrast, their neck & heal blocks are often massive chunks of lumber - but all that wood & weight is simply suspended in the frame of the instrument.
I think we would all agree that every part of a guitar effects the whole in one way or another, but the top is where the action is, and it's the one area where, at least to my eyeball assessment, Guilds have consistently avoided being overbuilt.