I’ve been using Amazon HD and Qobuz and I’m going get rid of Amazon. Qobuz has a better selection and it interfaces better with the Bluesound app.
Having said that, not every tune/album is recorded/produced/manufactured the same. I just listened to Seychelles by MT and it sounded good. I switched to Eloy, Floating (remastered) and it sounded a bit dull on both Amazon and Qobuz.
BTW, I’ve been a Eloy fan since the seventies.