My answer to the original question is; Dunno anymore.

I can however hear differences in the sound between speaker cables and more subtle changes with interconnects.

Some I think are improvements, some not.

I have made my own speaker cable and found it better and now made my own interconnects and found them better too.

I replaced my 'reassuringly' expensive cable and interconnects with Cat 5e in the Triple T model and made interconnects out of PTFE silver coated multistrand. 

I'm amazed and won't be spending any more big bucks on cables...