I would, from playing FF7 Rebirth the 4K setting has a lot of spikes where the framerates are barely playable, and performance mode has some instances where the dynamic render resolution drops low enough that it just looks like crap from time to time during gameplay and introduces a lot of ghosting and artifacts.
If it got enough of an uplift that the performance mode would keep the render resolution locked at 1080p60 or quality mode to allow 4K60 I'd upgrade for sure.