Michael Lowenstern also does a side-by-side, blindfolded, audio comparison of the Uebel, Buffet, and Royal Global Firebird bass clarinets. (FWIW, I was able to pick out the Buffet, but not the other two.)
If you've never seen the Royal Firebird bass -- I hadn't -- it's at https://www.corbinclarinetproducts.com/store/p31/firebirdbassclarinet.html. It's very pretty.