Ok, one more test with the PS5 before we move onto the PC. The Alienware 2521H is again a 1080p monitor, but this time supports up to 360hz. The technology is IPS. The screen is HDMI 2.0, however from what I've been able to test I believe that it does support VRR.
60.31ms at the top quarter of the screen.
63.97ms at the bottom quarter of the screen.
So the Alienware lines up fairly nicely with the LGC2. Again we are looking at around 58ms at the top of the screen and 65ms at the bottom of the screen. Which would line up with a 120hz output.