Sway is basically the wayland version of i3. I've switched to wayland on my new laptop and learning sway after using i3 for years has been relatively easy.
Yeah, the config syntax is exactly the same. The major difference is the wayland version of various programs can be hard to figure out with out some decent google-fu.
I'm on BSPWM on X11, but have been trying river wm and that is a much less friendly conversion than i3 to sway. I'd convert entirely were it not for certain applications still not quite working on wayland without considerable configuration (wacom tablet drivers don't work, screenshottung and eyedropper tools are available but still need more work to be feature comparable with equivalent tools on X11).
And I'm using proprietary NVIDIA drivers which are currently stuttering real bad on the wlroots protocol since driver update to 545 (sway/river both stutter bad whenever lots of movement on the screen, I've tried many tweaks to my environment variables to no avail).
So....just gonna wait for app, wayland, nvidia devs to eventually make the migrate worth while.