I've not had an issue with 90Hz 1.7x render with Airlink at 200Mbps fixed. I am hard wired to my router from PC. So this sounds like a setup issue on the router, or if it does not support at least WiFi 5 at 80Mhz.
If you are using your ISP provided router then this is the biggest bottleneck.
Regarding resolution, due to the Pro using two panels attached to the lens stack vs one on the Quest 2, you get more "visible" resulting in a higher resolution, higher Pixels Per degree, so the image is super sharp.
Also, not sure how you are able to see the edge of the display as the lens stack is fixed to the panels in the Pro, where the Quest 2 lens stack share one panel, and slides across the screen, so you will see this.
In regards to aliasing, this is more pronounced due to the displays being angled so the pixels become diagonally rather than horizontal and vertical. This increases the aliasing effect on level lines.
That said, adding high anti-aliasing and/or supersampling reduces this till it's not noticable.
To really get the most from the Pro you need a 4090 and link cable 1.7x render resolution, 500Mbps bit rate, Link Sharpening ON, to really get the best experience, amd get levels of details like you can from the likes of the G2, Varjo Aero.