"I can definitely hear the difference"
"Prove it?"
"No, stop asking."
^^ this thread
Sorry OP but that's how it looks from the bleachers. Totally understand that ABX is more like PITA and I don't blame you for not bothering. That said, if we went along with subjective claims without being annoying and insisting on ABX, we'd be posting on SBAF right now instead of ASR. I think this is an interesting result, but given PK's note about how the filter phase distortion might bump the diff numbers without having a major audible impact I'm not itching to run it down myself either.
Diff testing with music is really tricky from what I've seen, although I agree with your premise: I would LOVE to see a rigorous deltawave test as the main / gold standard for testing gear, (find all the differences at once, what's not to like?) but apparently it's very hard to do right.