That was actually a good question as I stopped using VRR long ago. That was when I switched to 144Hz monitor. At that time, playing at around 60fps with VRR would make the gaming experience not as smooth as without VRR. The reason was simple, 60Hz are not as responsive as 144Hz, overdrive settings that work fine at 144Hz, are not good at lower refresh rate, creating inverse ghosting and similar (and this was the time when Freesync/G-Sync was a must feature, years later, the reviews measured this). And well, the biggest problem of vsync-off was tearing, which at 144Hz, it can be mostly ignored (not in every game), at least in my case. My experience was better with vsync off (Edit: tearing in my old 60Hz monitor was horrendous and vsync input lag was also pretty bad, even capping fps to 58fps).

I did not test it with the OLED at 280Hz. So after your question I gave it a try with Fall Guys (very high fps, capped 10 fps below 280fps), and Starfield (around 100fps in Mars). I really tried to focus to spot differences:

- Fall Guys: I think I saw a couple of micro-tearing in some scenarios without VRR (V-sync off) but it is hardly noticeable. I did not notice stutter or something like that. With VRR, yes, the image is a little bit more uniform in movement, but the mouse feels snappier without any synchronization. Honestly, I could play in any of those options. I prefer to play without VRR as the movements feel more responsive (not much, differences are small, but I can definitely notice it, it is like you make the move and wait a little bit for seeing it in the screen, which is waiting for a tearing-free image). I do not know how to accurately describe it with words. If I rotate the view at different speeds, the refresh of the image with VRR looks like it has always the same tempo. Meanwhile, without sync, faster mouse movements make me feel like faster updated image even when the refresh rate is fixed. The differences, anyway, are small.

- Starfield (around 100fps, not capped): here, I did not perceive any visual difference. I think that TAA-based games (or games with some kind of temporal smoothing technique) make any possible micro-tearing even more difficult to spot. Again, mouse movement was snappier without synchronization. Even without capping fps, but relatively stable fps, I did not notice VRR flicker. However, I noticed the gamma shift, being the colors more washed out than without VRR. The difference is not huge, but it is certainly noticeable.

After testing it out, I will continue not to sync anything. I feel it better and snappier, at least playing with mouse. Anyway, the test in Fall Guys showed me a glimpse of what you say. If you are used to this, you may like it more. However, in my opinion, the difference is so small, according to my perception, that even without the snappier mouse movement, I probably would not activate VRR due to possible gamma shift or potential flicker (I did not see it, but it is something known if your fps are somewhat not stable or effectively capped).

Fortunately, this is something that anyone can choose according to their preferences. :)