In blind tests I could only hear a difference on certain tracks, listening to them back and forth to pick a difference, very small. I have noticed a difference though when listening to the same genre of music for a while on Spotify, then changing to a playlist on Apple Music and having a kind of ‘oh shit that sounds more detailed’ moment, but that’s very hard to prove. I first noticed that effect in the car switching between MP3 and physical CDs, but again, hard to prove.