At my local GAS station yesterday, decided to casually check some Epi SGs on the wall (before I looked at the Hag Swede... another story!).
I picked the attractive-looking Korina, and found it to be quite resonant unplugged. I then tried other epi SG styles, unplugged. None were showing the kind of body vibe and sound level as that Korina model did.

Is there a valid explanation for this?