yay thanks. that is such great information! wow, my mind has really been opened.
I agree with Pacomc79 and Chrisjnyc!
I've played through something similar - apparently its based on RG Keens Great Cheddar but with the last op amp section modded for more gain, as it was around unity stock.
It's a fuzzface wrapped with an Op amp input stage and an Op amp output gain stage. It has rat style hard clipping that is more assymetrical which means it will have a little more compression in the hard clipping than a typical FF. I think this can sound nice if your looking for something different. It also has Big Muff tone control with switchable EQ settings.
I think this is more for the person who wants a smooth compressed Fuzz Face with the occasional Big Muff sound vs. the person who wants a Big Muff sound and then a Fuzz Face sometimes.
It will give you the gain either way, but the circuit uses two transistors with hard clipping, vs. a BM with (4) cascaded stages and soft clipping