I know there is the camoflaged signature one as well which costs even more.
I think they are pretty cool guitars.
Best thing to do it to try and test one your self !
By virtue of their electrical properties, tubes generate a special waveform when they're saturated, which is why tube engineering has tremendous tonal advantages over solid state or DSP solutions, particularly for crunch and lead sounds. Tubes enter the saturation zone gradually or softly, which lends tube-driven tone its trademark yet totally unique character.