I don't really play loud, as a matter of fact I never do. But just for comparison; few weeks ago I picked up in a good condition JBL L90, those are from the 90's, and what a difference did that make! They were quite fine with the original quarter of a century old caps, somewhat forward sounding yet very revealing. I replaced those with Jantzen Superior Z-Cap on the signal path and Standard Z-Cap in parallels and I can say those are far more enjoyable speakers to listen to - very engaging they deliver every note with aplomb! Switched cables back to Focal today, and no, I could not play them longer than 10-15 minutes. They are too soft, although smooth, even without grills in front, and I would say, well, rather boring.
So this was kind of my point - do Kantas really sound that more joyful to listen to than Arias. If it is similar, with some added air for the twitters, than I probably do not want it. Cornwalls that is then.