It would be interesting to add a 2 Channel H to that lineup to see how it would compare. Surprisingly, I would say the Orange might have been the best.
The Marshall was reasonable throughout, but there were portions that just sounded, well, a little flat. The Blackstar sounded okay at the start, but ended up being very hollow toward the end. The Orange kind of had a raw, unfocused vibe to it and it didn't sound "huge," nevertheless, I thought it worked. The mesa was tight, but seemed to lack the aggression of the Orange and Marshall for some reason.
This is all subjective, of course, but it can still be interesting to see how people hear different things from the same sounds.