I didn't read the notes first so I was shocked at how much difference the Super Fifteen was making but that's probably because it's 'to taste'. It sounds by far the best there IMO, but then it might be possible to get somewhere near (or different, or better) with the eq on any of the other boxes that have it. My takeaway is that the Super Fifteen and the Noble consistently sound the best and the Caveman sounds consistently the worst, with all the rest being somewhere in the middle, very similar and moving depending on the bass used.
What was immediately obvious though is how they all sound WAY more the same than different. Aint none of these a Sansamp or a Darkglass are they? Caveat: Youtube compression.