This video compares the Final Fantasy VI Pixel Remaster opera scene running in two different modes on the PlayStation 5 Pro.
You can find the reference video below:
The regular PS4 version is running with the “Enhance Image Quality for PS4 Games” setting set to disabled.
The PS5 Pro version has the “Enhance Image Quality for PS4 Games” setting set to enabled.
The image quality is slightly sharper with “Enhance Image Quality for PS4 Games” turned on. It is really hard to tell a difference if you are looking at the character sprites. The enhancements are clearer in texts and some of the 3D background from the opera scene.