The GAIN is obviously much higher. With the LEVEL up all the way, and the GAIN down, you can achieve Sex Drive "style" clean boosting, on a limited scale. The opposite, of course will give you the most gain all the way to violin style singing.

The TONE circuit is much more active than that of the Sex Drive, due to the more aggressive sound, and not going for transparency. The compression, well there is no compression setting, I opted for a NORM/FAT switch, to cover the tonal basis of all guitars that might be used. If the NORM setting seems very thin to you, try it on a hollow body guitar in the neck position, this should make sense to you.