I wouldn't call it day and night, but I think unless someone has hearing loss (whether due to age or overexposure) they will hear a definite, unquestionable difference in a blinded, side-by-side, level-matched test which has the ability to switch without delay (minimizing dependence on audio memory).
"Different" is one thing. Whether it is "significant" enough to warrant the higher price is another thing. And whether the difference translates into significant
SUBJECTIVE IMPROVEMENT to warrant the higher price is something else.
People who have lived for months and years with 10 or more sets of speaker
concurrently may feel that good
similarly spec speakers sound more alike than they sound differently. Thus the term "diminishing returns" come to mind.
Different is one thing. Actual significant improvement is another. Only the OP can determine this.
When I was on my 12 pairs of speaker buying spree, I didn't really care if they were "significant" or "worth" the money. I only care now. But I never cared in the past.
So perhaps the OP (and others) may not care either.
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.
