Ethernet cables

Ethernet cables like all other interconnects in high end audio can make a significant difference, depending on your system and components they can make an almost imperceptible difference or a very substantial one. Matching the cost with the improvement by experimentation is a prudent method to choose cables. I use DHLabs and Cardas Ethernet cables although I have tried a few others,

Applying logic as to why they should or should not make a difference is best done after you have tried a variety of them, 

As others have chimed in, 

Yes.

As to why, I have no idea, but they do.

Bob

Network acoustics.com 

And  Soblon 

Both made in the u.k and much better then main strsam digital cables 

Even a Bluejeans Cat6a will be a vast improvement over any stock Amazon whatever. Of course, the Bluejeans is as far as I’ve gotten! ;)

But yeah, also a decent network switch and linear power supplies wherever you can manage is a big part of it. Finally, some filtering too (not to get too off topic but that also helps):

These are affordable and also made a difference
 

👍🏼

You asked, so my answer is no. I doubt anyone here has honestly heard a difference they could reliably distinguish on sonics alone. Some might say use CAT 8 because of the additional shielding but I am even skeptical of that. As a mid-point between super cheap and stupid expensive, I like these simply because of the connectors and build quality.  If you have a long run, consider optical/fiber.