"The thing is, as much as guys like to split hairs between the different versions of Big Muff, it's still a Big Muff. The differences from version to version may be scrutinized until the end of time, but they are infinitesimal compared to the difference between any of them and any other type of fuzz. The most different one I ever heard was the IC Muff, which is probably why it's my favorite. But it's all an argument over retardedly similar shades of Muff".
I am not an expert and I play at bedroom levels, but I do not agree.
I currently own these muffs:
w&c caprid
ehx nyc reissue
ehx green russian reissue
ic 78 clone
I also own a macari's tc tonebender IV reissue (jumbo circuit), which is a modified muff.
They sound pretty different to me. For example, the caprid has nothing to do with the green. The tonebender is a different animal.