Upgrade from B&W 802D1 to Focal Utopia Scala Evo

I had heard that somewhere before, but could not find anything more about it. I had heard that the tweeter can just stop working or more commonly, the sound of the tweeter starts becoming harsher / harder / more abrasive sounding (i'm not good with describing audio sounds).

Can anyone find a link to any articles that confirm this?

Doesn't seem like it applies to any of the B&W Diamond tweeters.

https://speakerrepairshop.nl/en/questions/tweeters-with-ferrofluid/c-119

From what I found on the internet, non of the diamond tweeters use ferrofluid in the tweeters. It's used in the metallic tweeters in the other series.

Not sure where you found that information on D3s and D4 tweeters

OK...here's a question: Why did my PS Audio BHK preamp/monoblocks matched with my B&W 802D speakers sound so much better than my PS Audio BHK preamp/monoblocks matched with these Focal Scala Evo speakers ???

Hey,

While we’re on the subject…

I’m seeking your opinions on a suitable (used) amp for Focal 936 speakers. 
Not the K2’s. 
 

Cheers,

Peter