Glass v.s. Plastic Toslink

I copied these two posts above from computer audiophile site,very interesting opinion,which makes me regret that I bought sonicwave glass optical cable:) Ok I'll see and hear and then tell my opinion.

Raising a GLASS to GLASS!

Ok,so far the sonicwave quartz glass optical toslink cable sounds the best when connected between dac and cd player.I would say neutral sound,everything sounds right,high frequencies sounds better compared to analog cables
Using mini adapter connected to computers spdif out I can only play 48Hz and 44.1hz
Sound somehow gets warmer,less clarity compared to cd player.May be this the basic reason why so many wireworld supernova 6 mini toslink used cables appear on sale here on audiogon

Glass in my tests. Toslink is a joke IMO, too bad AT&T ST interfaces are gone.

I want to invest in higher quality cables for my connection. So given the choice, my music server has both toslink and coaxial outs to connect to my DAC, which is better, the coaxial or the toslink? Or does it just depend?