I love Windows 10 and used it from preview, but like OSX better. WSL is like improved Cygwin for me (I know they aren't the same under the hood and WSL is way more powerful). Still not exactly as smooth or integrated as bash/zsh on OSX.

OS X has better multi monitor DPI handling, more dev tools written for it (brew blows chocolatey out of the park), and in general just feels smoother.