Better overall performance at lower frame rates and you crank up the quality of the scenery more. I run at 50% and I only have a 60 Hz monitor, so in essence I’m locked at 30 FPS and run my settings on Ultra.
When I run at 60 FPS for 100%, I get stutters near large airports since it pegs out the CPU. At 30 FPS (50%) smoother as butter around large airport and my CPU doesn’t peg.
I have a 3080ti, I9-11900 and 128GB RAM.