Speaking only about my experience, I can't obviously speak about the quality of the music we will listen with the new ethernet connector; the same thing about the USB connection.
But I can say you that listening Devialet D Premier (as with any other comparable system) with good (audiophile)...
In my experience this post summarises the essential about the problems ins discussion.
I only want to add some proposals that may be very useful for other users: (i) never forget that the topology of the network created with Apple devices is "in star", never sequential; (ii) so, if the distance...