Are there differing qualities of optical cable?

Since the consensus seems to be that coax is better than optical, I ordered the DH Labs D-750 coax cable.
Hopefully it will do an even better job than my Monster optical cable, which is sounding quite good right now.

I installed a new glass fiber optical cable.  It was a definite improvement over my previous Monster optical.
Today I just got a new DH Labs Silver Sonic coax cable.
Again, a definite improvement over my previous Cardas coax AND definitely better than the new optical.
So, double improvement!
Thanks for all the suggestions.

Question:  Does coax cable require burn in?
It sounds great right now.

Thanks Auxinput for your awesome suggestion.
i can’t believe the difference.
The cable removed distortion I had in a very, very loud Mahler symphony (#8) and significantly improved sound staging.

And there are people that say cables don’t make a difference!

After reading the above blog, I can only assume my observations are delusional.
After all, how can the ear of a musician match the accuracy of scientific instruments?
I’ll return the cables immediately!

Willemj:

So you evidently believe that the differences I, and others hear, is imaginary.
The objective listening of listeners to various cables is real.
Obviously the testing instruments are not capable of picking up the kinds of differences people hear.
These tests are useless and hence, worthless!

Blind faith in current scientific methodology leaves no room for discovery.

I got the glass cable before I heard of DH Labs or I would have.
(Still can I guess.)