As someone with a 120fps compatible TV, I never really use 120fps mode because there's usually huge visual downgrades to accommodate the 2x/4x increase in framerate.
I can assure you that I can notice the difference between 120 and 90. Blessed those who can't honestly, it's by no way unplayable of course, but I feel it.
I like when games have performance modes with unlocked framerates, but I never touch modes that actually push for 120fps. Way to big of a visual hit usually.
I find it difficult to tell the difference between 90 and 120 just by looking at them. However, although small I think a sudden drop from 120 to 90 could be perceptible because it's an interruption of the smoothness you're used to. Obviously it depends on context and I'm not saying it's anything more than a minuscule blip when you go from 8.3ms frame time to 11.1ms, I'm just saying I don't think it breaks the laws of the universe to claim you notice it.
Personally, I think a game could jump back and forth from 90-120fps all day and if I had VRR I wouldn't care in the slightest.
I can assure you that I can notice the difference between 120 and 90. Blessed those who can't honestly, it's by no way unplayable of course, but I feel it.
Absolutely. If I'd have to play a 30fps game I would turn sens down to 1 or 2 out of 10. 60fps sens 5-7. 120fps sens 7-10.
That's the great thing about framerate and controls, they're tightly connected.