So I went to Guitar Center, and I asked to look at the Big Muffs. I looked at the Russian and American. The first thing I noticed is that the Russian is MUCH smaller (which I like.) Also, I asked Derrick (the main bass guy) why they stopped making the green one. His response was, "The green one was only made because the black paint ran out at the factory in Russia, so they used green." Is that true? Sounds pretty cool to me.