The first version of the Death by Fuzz and the second one have only one thing in common: Both are heavily saturated fuzzes that will blow your face off. Besides that, we are talking about 2 totally different circuits. The Death By Fuzz II isn’t a direct update over the original model but rather a complementary model that includes a totally different set of features.
The Death by Audio Fuzz war ™ is a monster, but V1 basically turns it on and makes some noise. Because with seven transistors, there was no ‚low gain‘ and no ‚slightly settings, ‘so DBA made a second version and went back to the roots by keeping it closer to the all mighty and well-known Big Muff ™. They added some germanium diodes for aggressive clipping and away more radical tone control with a little bit of a wah feeling to it. In my personal build, I added a momentary footswitch to pads 1 and 2 of the tone control potentiometer for some intro riffs with no treble at all. Even know what it’s based on, this is a pedal you not just add to your collection on the shelf, and I can’t wait to hear you guys riffing with it.
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.