Wait, I'm confused, what's the myth? You just said, both headphones scale pretty well (which I have always taken to mean -- the better an amp you throw at them, the better they sound). So isn't the logical conclusion to throw absolutely the best amp at them that you can afford?
Besides, these are both HOTL headphones (high on the line -- not top of the line, but close) headphones, both, IIRC, receiving a great deal of trickle-down technology from both lines' TOTL headphones. It's not like the L3000 or R10 or the Qualia -- all of which just have weird sound signatures, and need the best amp one can throw at it for other reasons (e.g., in the R10's case, because it's a power-hungry pig).
So...what was the question again? I think I just rambled (yet another sign that I'm geezin'.)