Here's an article with Gene claiming Gibson is using premium wood for these. He also says they improved their finishing and the bridge is set up perfectly in relation to the neck and the pickups.
https://consequence.net/2021/03/gene-simmons-g2-kiss-interview-2021/
Finish does not influence sound, we've long established that here. Premium wood with Gibson probably means that it is legally imported?
And from what Gene says about "repositioning the bridge" I'm not sure he doesn't mean repositioning the pick-ups in relationship to the bridge. No sense in knocking him for that, this guy probably set up a bass by himself 50 years ago - if ever - and has since then been in the hand of guitar techs. He probably can't tell you the components of the theater blood he spits every night either (but I hope it at least comes in different flavors:
"It's wild cherry night tonight, Chaim!").
It's a stretch to envisage any of this making the
Geneson TBirds sound any different to a rank and file TBird in a meaningful way. It seems to me that him and Gibson focused on making the thing look valuable. His Punishers were certainly immaculate in craftsmanship. But that had at least also certain playability components to it and was a design of its own.
Let's see how they tackle the inherent problems of getting a Flying V bass to sound good.