It's hard to say. I would definitely choose the Mac version over Windows 10, there are still some issues with Windows 10. But some Mac users have reported problems with Sierra (although not me, turbotax works find for me). Last year I had Win 7 on bootcamp and installed both the Mac and PC versions and they both worked fine, other than the hassle of switching to bootcamp. If you are running an emulator that runs a PC inside a Mac window instead of rebooting into a full PC system, I would tend to worry that the emulation could cause issues and think that the native version will work better. Both Mac and PC seem equally supported, and they are built off a common platform so all the screens are the same as far as I can tell.
