I can tell the difference in games if I go looking for it, but in the middle of a tense shootout I honestly don't notice that I have double the DPI.
I have to admit with the display wrapping around into peripheral vision, it is very immersive.
[1] https://www.youtube.com/watch?v=iQ404RCyqhk
[2] https://rog.asus.com/monitors/27-to-31-5-inches/rog-swift-ol...