It's easy to tell them apart with a meter, but if the frequency response variations caused by the cables are less than about 0.1dB then you are unlikely to be able to hear them.

The cable industry is built on the assumption that factors other than these are audible and that cables costing hundreds or thousands of pounds can be justified by their sound. Debating whether and how this can be the case is surely a valid waste of time on a forum?

I'm guessing that Murray is going to report that these cables could be distinguished in his blind test. In which case, assuming the FR deviations are negligible, he has a good prima facie claim on Randi's $1000000.

Paul