1080p has upscaling off. It is a 3840 X 2160 capture because to get downsampling resolutions at all in shitty UWP games you have to have it set to your desktop resolution. Ergo, 2160p and how the game capture via windows captures at that in spite of it being set to 1920X1080 in the menu.
The AA option stabilises thin geometry in the distance quite obviously, I assume by temporal super sampling or something. But at the same time, frame cost it incurs makes me wonder if they actually have Transparency SSAA or A2C like in Alan Wake. I am trying to find a host to upload the vid showing off the AA difference as we speak... gamersyde upload just doesn't work for me anymore.
edit:
Download link to the video on Filehorst.de
edit2: gamersyde upload function has not worked for months btw. Same for everyone else?