I have pretty well always have had both, in fact, bought a new(er) windows laptop this week - don't let anyone tell you they are cheap if you want something decent.
I have done music on both and TBH, life is too short for me to do music on windows. I know, a lot of people use it and swear by it, and if you really love windows you probably won't get on with the mac that much so you are probably better off with windows.
Don't rule out either a refurbed mac (available on the store, a few hundred quid off), or a second hand of a few years old,, my macbook is 2013 and I don't really have a pressing need to update it yet.