This Seeking Tech article compares the PS4 version of with the PS4 Image Enhancement feature of the PS5 Pro enabled and disabled.
You can find the video below:
The results of PS4 Image Enhancement are a little mixed. Although the game does look a little sharper, the colors appear a little more washed out.
So, you may want to use the Vivid filter in the in-game menu to add more color to the image if you don’t like the default look with the image enhancement.