The application's similar, but the drivers aren't. Wacom's drivers and configuration management are a lot more finicky under Windows. Another helpful thing: Core Audio is about as fast as ASIO is under Windows, making music and SFX more pleasant to work on here--even, again, when writing a game in C#. (Even discounting that Logic doesn't run at all under Windows.)
It also has the nice side effect of not making me hate the computer I'm using and the project I am working on. The more things I have to touch on Windows, the more unhappy I am; I find it to be unpleasant and death-by-a-thousand-cuts draining to use for more than casual use (I own a Surface Pro 3, but only because I got it very cheap). There are two applications open in my Parallels virtual machine: Sublime Text (for editing YAML files) and Visual Studio for working on code--it's the minimal set of things I have to touch to use C# for development.