I'd quit my job if they forced me to use Mac OS over my Linux desktop, so it really depends on what you're looking for and how much you are willing/able to customize your interface.
I've never used mac os, but definitely get you on sane defaults. From what I could tell, the few linux desktops that were actually meant to be used with their defaults and not customized immediately were the ones on elementary OS and Gnome, and they've actually gotten pretty nice and consistent in their design, and pretty good about spacing.
