Assuming I'm correct (or close), this is not a clone of another pedal. It's a portion of a preamp. I'm not aware of a pedal with exactly the same circuit. That's not to say it's some amazing new design, it's still a combination of opamp/diode clipping and passive tone controls.
If you'd be disappointed to find a Tube Screamer, Rat, Guv'nor, or some other clone I think you can be at ease, although that's not necessarily saying you'll be ecstatic about what it is either.
At this point I'm not really questioning "what" the circuit is, but how much has been changed to adapt it to a pedal.
I think this is one of those happy accidents that sounds great but isn't necessarily based on anything that was used by the bands or on the albums in question.... But it doesn't really matter where the circuit came from if it gives the sound you're looking for.
As far as the designer is concerned... I've read through his story about the pedal and he seems to be pretty straight up and humble about the fact that this is his first pedal design, he didn't really know what he was doing going in, and had to enlist the help from a couple other pedal builders to make it work. That's a nice relief over the usual "years of research and painstaking development" to find a Tube Screamer with a couple component tweaks. And at £99 it's not like the guy is "making bank" on the thing, no matter how many he's churning out.
Now, assuming I'm way off base, we'll have two new projects soon. The prototype is decent enough that I wouldn't scrap it regardless.
As soon as I can say for sure I'll tell ya what it is, and what I thought it was if I'm incorrect.