Currently you can't turn off vsync on wayland, except some limited cases involving full screen apps with direct scanout that may not even be implemented in your compositor or may not be possible due to missing implementation for async page flips with atomic modesetting.
Due to design issues relating to implicit sync with wayland any misbehaving app can cause your entire desktop to drop frames so if you're a multi monitor user expect stutters when the browser you have open in the background was a little too slow. Or worse if an app is badly broken [1]
The good news is that all of this is fixable. Windows has forced compositing for most cases and it performs much more consistently. A browser taking a while to render can't hang unrelated windows' composition. Wayland compositors can get there too eventually by moving to explicit sync APIs [2].
For now if you do care about these issues staying on compositorless X is the least bad option.
[1]: https://github.com/ascent12/compositor-killer
[2]: https://www.collabora.com/news-and-blog/blog/2022/06/09/brid...