@panzrwagn Well said.
Ethernet is not a waveform, and it cares not what type of copper it’s sent over; if it shows up intact, that is the best you will get. So it’s pointless to buy expensive ethernet cables if you hear a difference is purely confirmation bias.
If you want to know how many hops your data takes before it gets to your player, run a Trace Route C:\tracert Qobuz.com (or whatever your service) That data has traveled thousands of miles and run over MANY different networks before arriving at your home. Saying you can hear a difference between a 1' or 100' CAT5\6\7\8 cable is pure confirmation bias. You spent loads of money on it; you can listen to the difference by golly. That is not how ethernet works.