WIFI vs LAN vs Sound Quality

[MikeyFresh]

You can sometimes get a better result with WiFi simply because that eliminates one potential source for ground loop. This is especially true if using a shielded Ethernet cable, because the shield is connected to ground at both ends of the cable (typically).

So use of UTP Ethernet cable is preferred, and trying WiFi can sometimes sound better, as it affords galvanic isolation between the stereo and home network.