TOSLINK OPTICAL cables


simple question....is there an audible difference in the quality of these cables?  Recommendation?

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I go with polished glass. Not much more money. Never fails no matter the length. 
I hooked up my CD transport and compared good coax to inexpensive Toslink, then switched back and forth to try to hear a difference. I cannot say I heard one. Others will have different views, I’m sure, but what I’d like to learn is why different optical cable technologies *could* matter? Interesting discussion here: https://arstechnica.com/civis/viewtopic.php?t=648269