Every time I play Beck’s Morning Phase album I notice it always sounds crisper and more defined in through the Onkyo HF Player instead of Apple Music. It is the app and not the file quality because I bought the original download from Apple Music and not elsewhere. So the only variable is that of the app. In other words it is the algorithm of the app that makes the sound quality better.
While I enjoy the convenience of Apple Music it is ultimately the sound quality that is important. In general, the audio sounds flatter and with less definition in Apple Music. This is not noticeable except through contrastive comparison. But still I would probably enjoy it less subliminally as I do notice the difference. Apple Music sounds lacklustre.