I have had most of the Ecstasy amps. The 101B is the most compressed and darkest. Bogner uses a log treble pot, which means that from 0 - noon the pot only changes around 10 percent or so, sweep-wise. Also the mid pot is like a high shelf knob that starts in the mids, around 500-600Hz or so. This is why people have trouble dialing in these amps, but it's part of the signature sound.
I prefer the less compressed 100A, Classic & 20th Anniversary versions. They're just more dynamic. I actually have one of the first, if not the first 20th Anniversary model. It came with EL34 (custom order). I had it changed back to 6L6 and it sounds more balanced and perhaps a little less compressed. In talking with Jorg at Bogner he informed me that due to the design, there is more midrange in the circuit than other models and that 6L6 balances the design philosophy.