Been using sway for many years before moving to niri last year.
Outside of the fundamental window management differences, I find that a lot of stuff with niri is easier to make work, or just happens to work out of the box. Screen sharing with sway was always a problem for me[1], whereas for niri it works great (incl. sharing individual windows only[2].) I also found that niri is much better at letting hardware go to sleep (which saves 10W on my GPU.)
Been using sway for many years before moving to niri last year.
Outside of the fundamental window management differences, I find that a lot of stuff with niri is easier to make work, or just happens to work out of the box. Screen sharing with sway was always a problem for me[1], whereas for niri it works great (incl. sharing individual windows only[2].) I also found that niri is much better at letting hardware go to sleep (which saves 10W on my GPU.)
[1]: https://github.com/swaywm/sway/issues/7898 etc.
[2]: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3864