Audiophile Ethernet switches are a waste of money.
There’s no logical reason why swapping one Ethernet switch for another would make a sonic difference. Think about it - if there was a difference, that means the data (and by that I mean only the bits that were part of the data payload, not the address headers, etc.) would somehow have changed between your AT&T router and the NUC.
Let’s put it another way - if you’re streaming music, the network packets will make their way through multiple routers and switches to reach your local network. If networking equipment altered data and digital signals were fragile, how could we have reliable transmission of any information at all?