oh don't get me wrong, I prefer a high gain fuzz sound to the Dual Rectifier sound. The Russian pedals have a different sound - more of a conventional distortion. I've been meaning to replace the cr@ppy parts in my Russian. The green sovtek pedals are considered better than many of the vintage USA made big muffs - David Gilmour has one in his uber rig.
I bought a Frantone "The Sweet" fuzz pedal. Fran designed the USA reissue Big Muff Pi pedal for EH. The Sweet isn't a big muff clone, but can easily cover all the sounds a big muff can do but has an even bigger headroom. It uses new/old stock germanium resistors which all the decent fuzz pedals use. It's also only half the size of the Big Muff.