Keetakawee,
I tried my EtherStream + Nikola Classic + Flagship CAT 8.1 cable in my Jplay Femto two PC system. A nice step up in sound quality in most respects. Most noticeable is a smoother and more natural sound with more high frequency detail. There is more space around instruments and voices which do seem to hang in space now. Cymbals have more layers of detail and there is more bass extension.
In all it sounds more like a live performance being played out in front of you with more detail than before. Not sure if this sound is getting closer to the studio master tape or if there are more improvements to make? I also tried TIDAL streaming and it does sound closer to locally stored music files.
Regards,
Geoff