I own the Gryphon and Chimera. That was my Chimera on the ampfest videos.
I find that some high gain amps can feel kind of sterile in how they respond. These aren't like that. They "feel" like a more classic amp in the way that they respond to your playing and articulation, but they can obviously sound very focused and aggressive. Notice how the Chimera in the videos goes from 80's Shred/EVH tones (when psychodave played it with his Charvel), to down-tuned Brewtal metal (when Exafro played it with his 7-string) so easily? It really responds differently to different guitars/pickups/players/etc.
Another thing about it, is it does not feel too compressed, and klanky. Psychodave's Cameron Aldrich was right next to it, and Dave played through it with his Charvel as well. It sounded great, but it sounded VERY compressed compared to the Chimera. Nothing wrong with that at all, and I'm not taking anything away from the Cameron. Some people might prefer one or the other. So, if you're looking for a Really compressed feeling amp, it might not make you as happy. You could always use a boost to add that extra compression if that's what you want, I guess. I just find that it has just the right amount of compression in the right ways to make it comfortable to play, but not overly compressed where it fights against your dynamics and articulation. It's apparent right away, when you play it.
I don't know how else to describe it. I'm not great at describing these things. I hope this helped a bit.