How long have you had your QB-9? I don’t see your posts talking about it. The Twenty is a new circuit and with different parts so I’m glad you can hear a difference.
I put the Twenty upgrade at “nice” rather than “wow”. I’m really happy with my system and the Twenty upgrade made a nice difference, snapping the sonic picture ever more into focus to use an analogy. It’s kinda the icing on the cake, bringing a refined sound all around. It was worth the coin to me even if my system is still short of the very best $ystem I’ve heard. At this point, my modified Thiels are my weak link. You can’t have everything at their price point and bass definition (passive radiator rather than sealed) and extension (8” woofer) can’t match $$$peakers even if otherwise very good (and my modded Thiels *do* pretty much match the best I’ve heard in terms of resolution and transparency).
In my system, I thought the original QB-9 was close to vinyl if playing 24 bit files, in some ways better (bass and silent backgrounds), in some ways worse (relative loss of textures and midrange warmth). The DSD version playing 24 bit files pretty well matched the sonic strengths of vinyl while adding the tomb silent background of digital. I may or may not compare the Twenty version to my vinyl rig - I rarely play vinyl after I got the DSD version.