I gained 7-9% across almost all metrics moving from 537.67 to 556.12.
Most people are reporting better performance with the latter driver.
I cap my FPS at 60 FPS, even though I can get 90 FPS in some scenarios.
There’s no benefit in this sim to go any higher, unless you have a VR headset that can do 90 FPS natively, along with the horsepower to make it happen.