Digital data transmission is basically an all or nothing proposition. If you don't have dropouts, hiccups, or pops during playback then the audio data is getting from point A to B intact. There's no logical reason for the sound quality to be different whether you're using a wireless or wired connection.
@yage You’ve obviously very little experience with various streaming setups and have no idea what you’re talking about. Go back to ASR where you’ll find many friends and disciples.