I have to say, I am truly impressed with the tonal qualities and imaging of the Duelund PIO caps used in the outputs of the Motherlode! I still say that the True Copper Audyns are a hair- and I mean just a "hair" less smooth, but with the same overall presentation and at a much more economical level. However I haven't stopped listening to the Motherlode since I buttoned the bottom cover on, and I'm hearing things I've never heard sound so real in my system before. Having never personally heard "The Dude", I can't say how much of a difference there is (if any), but having the same basic architecture in place, and similar high end components used throughout, I can only surmise that the Motherlode is a "sister from anutha mister". Best wishes, Aric