Ori and the Blind Forest: Definitive Edition is coming to Switch tomorrow, and by and large, it seems the Switch version is the best of the releases so far. This information comes straight from Thomas Mahler, Game Director at Moon Studios. In a Resetera thread, Mahler explains why the Switch version has a leg up on the previous releases.
Keep in mind that we've been working with our engine for a good 10 years now and went through multiple releases and a sequel now. A lot of the optimizations we did for Will of the Wisps ended up in the Blind Forest version for Switch, so that was a nice side-effect.
Another thing people maybe don't notice immediately is that Ori's sprites were animated at 30fps on Xbox/PC, but for Switch we were actually able to update the animations to 60fps due to all the optimizations, so technically Ori actually even animates a bit smoother on Switch than on the other platforms :)