Apple Music Streaming service > Spotify in the W221
Apple Music usability isn't on par with Spotify, but I expect that to change as they improve the UI and add additional features. Quality wise it doesn't sound any different, but then again I'm restricted to 320kbps on bluetooth anyways (I think Apple is streaming 256kbps files?). I'd have to go wired to go true lossless, but I prefer the convenience of Bluetooth and portability.
One big advantage to Apples internal player is the ability to apply EQ to the stream. Bass Booster in the S550 with the HK sound seems to be optimal. It tames the middle and puts more low end into the door and rear deck subs.





