In general coax should be better. Toslink has slow transitions that can convert system noise into jitter but doesn't have reflections, doesn't make ground loops and is not sensitive to ambient electrical noise. All comes to jitter that converts to noise. There is no way you can measure anything so the best way is to try. Perhaps you can borrow cables from local stereo store.
max length of toslink or coaxial digital cable without signal degradation?
I hope this is a fairly straight-forward question and doesn't involve too much subjective opinion.
I have an Oppo 203 in my video stack, quite separate from my audio stack. If I were to use the Oppo as a transport for a (hypothetical) DAC (sitting in the audio rack), I'd need perhaps an 8' cable to connect them.
Would that distance lead to signal degradation? Is one transmission mode superior to the other for these kinds of lengths?