This may be a dumb question, but I’m wondering why one might one a 220v moogerfooger over 110v one? Does it do anything to the actual sound or quality of the pedal. Like is there less volume drop in the 220v one or is there no difference in the pedal itself, and its just made for different countries?
You nailed it, give this man an evil monkey doll 
220 volts hertz more.
Btw, they don’t run on mains voltage, instead they use power adaptors/wall warts at nine volts DC or so. With all the stuff I get from the States, I mostly just put the adaptor to one side.
The difference is 110V.
220V - 110V = 110V 
220… 221… Whatever it takes… 
(very bad 80s movie reference…)
Actually, a VERY GOOD 80s movie reference!
I use it all the time.
the pedals no different, they just ship a different chinese wall wart with it