> I'd like to think that those who don't notice the difference have improved brain GPUs that can compensate for ghosting.

Wow. My perspective was those that did notice the difference were more perceptive. Thank you - now I realize there is a completely different take. (I'm not sure that it's helpful mind you... but it gives me something to chew on).

How can you know it is not bias? For what its worth you might have never noticed any difference if you didn't knew they weren't refreshing at the same frequency.

Oh for me it's very clear.

Specially between 60hz and 120+.

Scrolling looks blurry/ghosted in 60hz.

I guess I could vibe code an app to set monitor Hz randomly in either 60 or 280 and test.

But it would be a waste of time from how clearly I can tell the difference.

For those of us who can see it, they are very noticeable. And could be told in blind testing 100% of times. After all 240Hz is still 4.1ms per frame, Again I have to point to this Microsoft Research Video.

https://www.youtube.com/watch?v=vOvQCPLkPt4

Wait until you try an OLED computer monitor, that screws with the "higher refresh rate => less ghosting" thought process completely.

Oh yeah I have an Oled LG C4 TV with 120hz refresh rate.

Can't go back to non-oleds.