Wow! The Ultra Quality has more detail on a number of textures, like the brick wall. Plus the power lines are less alias than Native which has jaggies. I will have to see this in motion.Here are the same images, but as lossless PNGs so you can see actual quality.
This is on Ubuntu 21.04, Nvidia driver 465 on an RTX 2080 Ti.
Performance in Terminator is much better in borderless window, the previously mentioned performance drop was due to fullscreen mode.