I think if you own $15k ICs, there has to be a predetermined level of bias that would affect the objectivity of this comparison. Here's a real case for a blind test.
Who would want to admit that their $15k ICs sound the same as a pair of $2K ICs or worse, not as good? And, even if the $15k ICs sounded marginally better how could you rationalize a $13k price difference? I don't usually make value judgements or criticize others choices but isn't $15K for a pair of ICs bordering on obscene? How good can they be?
No ones claiming the Gabriels are the absolutely "best" ICs out there but they are damn good for the money!