I don't think it's about tightness and focus. It's speaker EQ. The greenback imprint makes the profile sound thin, tinny, harsh, like something digital. It's always hard to describe sound so you best try it out yourself to hear what I mean. When it comes to the cab I do think it often sounds boxy but that might be my inability to dial in the profiles.
The kabinet sounds boxy, its not the kones fault, nor your fault. How does the V30 sounds on it to your opinon? It makes me courious as I find the V30 particularly harsh (the same as real ones), so maybe we can start from there. I will try it with the marshalls on the 2020 pack, with my 212 kone cab, and will let you know. As comparison, I have a Cabinet with a waza speaker, I expect to sound similar to it.