Ethernet cable question

So last night I was listening to my system after just switching the Node 2i over to ethernet the day before (i had been using it on my 5ghz wifi prior to that because the wall plate and jack were not finished at the stereo until the day before). Something was different, I did not enjoy it as much as I had been. It sounded more closed in. I listened for a while and it sounded good, detailed, but not like as open as it did previously. I took the ethernet cable out to let it go back to wifi, and now its back to what I was enjoying. I then did a quick search on wifi vs ethernet and found the John Darko video on this topic. I am sure mine has to do with the cheap Cat 5e cable that is in the walls when I ran these cables 8 years ago when our home was being built. Its about a 40 ft run to where the system is located. Back then when I was running this I wasn't thinking about audiophile streaming. I am sure with good insulated ethernet cable it may have a different outcome, but for my setup I am going back to wifi as it definitely sounded better.

I wired my modem to my BlueSound Node 2i using CAT6.  The local dealer said that was better than CAT5.  Hope the dealer advised me correctly.

Larry, it may be for your situation. However for me it was not. It would be worth your time to A/B wifi and ethernet.

@jmphotography , It seems to me that you may want to look into the Modem and Router if you are experiencing a marked difference between WiFi and Hardwire. 

Which do you have Cat 5 or 5e, you mention both? Cat 5 is susceptible to crosstalk 5e not so much. If it's Cat 5 your wifi might sound better, 5e I would  check connections etc... I have Cat6 (compareable to 5e) never noticed a difference except for occasional dropout with wifi.