It's between a 3080 mobile and a 3080 in terms of raw hardware, if that helps, closer to the mobile version (minus obvious heat mitigation shortcomings).
I compare it to a 3X series than a 2X because it's one specific spec that devs can target, leading to better optimization. And PS5 does have a few specific propreitary tricks to leverage as well compared to a PC.
Plus... it's not like the 2X GPUs are dirt cheap to begin with. I see $250-300 new. If I'm going to buy a gaming PC, it may as well at least be better than the machine I already own, and that one part is already half the price of a PS5 base.