A sharpening filter does NOT magically create details.
No matter how you crank up your sharpness slider, you want get that rock details of PSSR
And yes, the whole point of the AI upscale solution, is to preserve the image details even at motion, and it's not just about the sharpness.
In the process, it also removes artifacts like ghostings.
It's funny to see how DLSS blurs at motion and shows ghosting artifacts like TAA does, yet people think it's amazing because it's temporarily more stable..
just like the TAA LOL