This Seeking Tech article compares Final Fantasy VII, Final Fantasy VIII and Final Fantasy IX with the PS4 Image Enhancement feature of the PS5 Pro enabled and disabled. All three of these PS4 remaster releases run at 1080p.
You can find the videos below:
Final Fantasy 7:
Final Fantasy 8:
Final Fantasy 9:
For the uninformed, the PS5 Pro features a PS4 Image Enhancement setting that may make some PS4 games look sharper.
This does not appear to have much effect on the pre-rendered backgrounds and cut scenes. However, the character and battle graphics do look a bit sharper with PS4 Image Enhancement.