I think the term Mura is being misused as I’m not seeing splotchy panels reported, the Samsung panel just seems a bit grainy on solid colour backgrounds but I can’t say I’ve seen it in games yet tbh. Even in menus you kind of have to look for it IME.
I wonder what screens review units had as I’ve not seen it mentioned at all in official channels? You’d assume Samsung since they were all non-LE but if they were pre-production units then who knows?
It depends what kind of games you play. Old games and emulation sure, newer games not so much.