The Xbox Series X version of Final Fantasy VII Rebirth offers three graphics mode: Graphics, Performance Sharp, and Performance Smooth.
The following video compares what the game looks like for all three:
Although the image quality is sharpest with the Graphics mode, the game runs at a choppier 30 frames per second.
Performance Sharp offers the second-best image quality, while also targeting 60 frames per second at the same time.
While Performance Smooth in the blurriest, it should be able to maintain 60 fps better than Performance Sharp in high stress scenarios.