Mac's are far more advanced and more responsive for doing tasks like producing music, graphics production or just browsing the web. If this is all you need, buy a Mac.
If you want to game more and don't mind not a having a computer that is built for simplicity and the above things. A PC is probably a better choice.
If you feel you have a good knowledge about computers, and want ease of customisation. Then a Linux is good, they are powerful and extremely simple to alter.
Whatever suits your needs. I have a Macbook Pro 2012 13" laptop, it runs minecraft at solid 60-70fps and is great for doing school things and graphics stuff.
Enjoy your machine