I've got a Mac and I've got a PC. I've got iTunes on both and do not note any difference. I've never bought music from the Apple Music store in my life. It is not necessary at all, I just don't get where people get these myths from. My sources are from ripping my own CDs or from downloads from sound cloud, or from the MP3 that Amazon gives you when you buy a CD. It all works perfectly within iTunes with great logical organisation.
Then from iTunes I synchronise my music with my iPhone, my Google Nexus 7, my Mercedes and my Audi, my daughter to her Wileyfox. And when I had active smart headrests in a previous car they even synced with the videos through there when my car was parked in our garage.
Cracking bit of software, works well on either system. I would love a Linux version.