An Electro-Harmonix Green Russian Big Muff Pi can be seen on [this](http://www.guitargeek.com/david-dederer-pusa-guitar-rig-and-gear-setup-1993/) detailed gear diagram of Dave Dederer's The Presidents of the United States of America stage setup.
In this interview with Total Guitar, Andrew Stockdale mentioned that when they were recording, and perhaps after, the first EP, he used a Russian Big Muff Pi along with an assortment of other amplifiers and a 70's SG electric guitar.
Here's a picture of Robin Finck of [Nine Inch Nails](http://equipboard.com/band/nine-inch-nails) and [Guns N' Roses](http://equipboard.com/band/guns-n-roses), posing with his pedal board, including the Electro-Harmonix Green Russian in the middle, on the top row.
It have more bass than the NYC one. For me it sounds better. This is a piece of history. EHX sure did a big mistake when they stopped the Russian labeled series and called green muff a bass one. It is confusing.