Hey Floyd, I dont really understand electronics much, but they do seem very very similar. It's odd though, having read all the advertising gumph I was always under the impression that the '69 was an overdrive rather than a circuit primarily based on the archetypal Fuzz-maker!
I remember hearing what you said about the TS9 circuit being heavily replicated everywhere, in fact I think I read the same thing on either the Analogman or Indyguitarist website. Maybe these circuit similarities are why the terms 'distortion', 'overdrive' and 'fuzz' are so often conflated.
Oh, and the offer's open, seriously, if you want to give it a spin. I'm hardly a great player, I'm usually glad for the warm blanket of fuzz that covers up your mistakes!
Sam, that demo I posted kind of shows you the wilder side of what it can do. Basically, the feedback circuit within the pedal is dependent on the value of the input signal, so it's pitch is essentially crudely controlled by the volume pots on your guitar. So for parts of the feedback section of that demo I've basically set one volume control really low and one really high (thereby creating two different pitches, one for each pickup), and I'm toggle switching between the two as I physically move the guitar around in relation to the amplifier. It creates some pretty cool effects! It's a pretty good fuzz too, but the sound quality on that demo is not so good. It's also a beast to control even in normal fuzz mode, you can get quite a lot of noise. And the distortion knob doesn't seem too responsive above a certain amount, but, hey I like it! :)