I did this 'comparison' literally hundreds of times (sighted I admit) and feel 'something' must be changed electrically between the two and a null test should easily pick it up - if it's there. 'All' my other not expensive and many home made interconnects sound all but the same irrespective of the RCA plugs used and so on...For “boutique” cables, the Linn interconnects are cheap. Still more than I would pay. People claim to hear things that don’t exist quite often. Some people hear voices in their head telling them to do despicable things. Almost always their defence in court is some form of insanity.