Transparent but not sterile is also the definition of the Quilter.
Super loud, sounds great, super light.
The lows provide lot of heft and are never muddy, medium frequencies are beautiful, highs are cristal clean and never harsh. When you push the gain, there's a sort of limiter that is hard to explain, but I like it even though I usually don't like compression. Some say it feels like a tube amp.
I don't know the Eich T900, I'm sure it sounds great too.
There's one obvious difference though: the Quilter's EQ is incredibly simple (that's what I was looking for), while the Eich's EQ seems to be much more versatile - I'd like to try the Taste knob…