Anyway, I voted for the B&W Diamond. If I don't care about "worth" or "significance",
I'm going to spend my money on DIAMOND. Beryllium isn't all that exotic to me.
BTW, I gave my uncle a few single-blinded tests on the B&W 802 Diamond vs Revel Salon 2 when I owned them.
He preferred the Diamond over the Beryllium.
Very subjective stuff.
As for me, Silk or Aluminum are great enough. It's the technology and design that is salient to me, not the actual material or content (actual percentage or purity of Beryllium or synthetic Diamond) of the tweeter or midrange.