They both suck. They just suck in different ways. Choose your poison.
Or don't choose and use both.
Or don't choose and use both.
But as the GP said : you can always use both, and there are a lot of ways to do so. A few games and softwares I use can't run on Linux so I keep a windows on dual-boot. WLS 2 is a great experience for a lot of folks, etc.