The Uberschall is a whole other kinds beast. I have an Ecstacy (the amp, not the pedal) and it's very hot rodded Marshall and the Red pedal is quite similar to that. The Uberschall is just a whole stack of metal oriented gain that loves chugs and has a more metal oriented gain. There's enough there that you don't need to saturate the signal with the gain knob cranked and it's just a killer tone. I got to play one the other week while on my search for an Uberschall head and was blown away by how good it sounded for a solid state device.