Probably should stay out of this one, but since I am here...............
There is no way to predict how any digital cable will sound, in any system. Yes, they all have one very significant parameter, that should be adhered to, but there is no way to cross-correlate how it will sound.
Even if there was...............
Any system has 3 parts: transmitter (source/transport), cable, and receiver (DAC). All three must have the same impedance. Does not matter what that value is, as long as all 3 are identical. (SPDIF is 75R, AES/EBU is 110R.)
So, what sounds bright in one system can sound dull and/or bass-heavy, in the next. Who knows? No one does. Yes, dorky nerds like me can measure something, and say "It is 'x'", but that is all it is worth. Unless you are the guy who sells it, calling it "x" when it is really "q". Which they have been known to do.
Hope you found something to your liking.
Well said and right on!