Not sure that is mura tbh, could be an issue with the picture/camera itself. For what it’s worth, after trying out alien isolation (somewhat dark game) and thinking about trying out the LE I decided to live with the 512gb. The mura (OLED temporal dithering) isn’t noticeable most of the time and can be alleviated with playing around with gamma settings within games. Ordering an LE is a lottery in itself regarding dead pixels, and there’s a longer track record regarding how the Samsung OLEDs hold up over time compared to the BOE panel (could be perfectly fine, could be more susceptible to burn in/ dead pixels down the road)
FSR from the overlay is systemwide and uses FSR 1. FSR 2 and only available through in game settings normally and is game specific