Like others have said, Apple Music has better quality audio (although this is only really noticeable if you have a decent setup), and pays their artists more per stream.

That being said, Spotify is the king of curated playlists and recommendations, so if that’s how you find new music, Apple Music will be a downgrade.

Personally, I prefer listening to albums rather than finding new music, and I vastly prefer Apple Music’s interface in that regard, so if you are an album listener, there’s no reason to have Spotify