they are very similar. my only problem with hyprland was that the mouse is still required for some things, and it's a bit annoying having to switch back and forth.
on sway, everything can be done by keyboard. i still use the mouse a lot, but there's less switching in the middle of tasks.
it's a little difference, but it was worth it for me.
there's also the drama about some people being transphobic (i think?) in the hyprland discord, but i try not to pay too much attention to that.
hyprland accomplishes it's goal of being pretty (and i got some really cool screenshots), but sway is pure functionality, and it's damn good at it.
the real Year of the Linux Desktop™ was the friends we made along the way.