How much improvement with better toslink cable?

What Sufentanil said.

Mattzack2,

I think it is possible to hear such differences in some scenarios with these cables where things are just not going right with the cable, but that it's just not as common place nor as significant a difference perhaps as I find typically with different ICs say.

I have to say digital cables is the component in my system I hear the least difference with from wire to wire. I hear clear differences between most any two analog ICs I try.