To be honest, the Resident Evil 4 Remake performs great on both the PS4 and PS5 in the most important scenarios.
Resident Evil 4 Remake Comparison PS4 vs PS5
Resident Evil 4 Remake - PS4 vs. PS5 Graphics Comparison & FPS Test!
Resident Evil 4 Remake File Size Revealed and it Blows Away Previous Entries in the Series
Resident Evil 4 Remake - PS5 vs PS4 Graphics Comparison (Performance Mode) [4K60HD]
Resident Evil 4 Remake Demo Comparison Videos Highlight Differences With The Original Game And More
Resident Evil 4 Remake Runs Better On PS5 But Xbox Series X Has One Thing Going For It –
Digital Foundry: Resident Evil 4 Remake - PS5 vs Xbox Series X/S vs PS4/Pro - All Consoles Tested : r/Games
Resident Evil 4 plays great on PS4, in case you were concerned
Remake of Evil 4, PS5 and PS4 compared: are there any differences? - Game News 24
Resident Evil 4 Remake - PS4 vs PS5 vs PC Graphics Comparison (4K)