Can someone explain the difference between the MDV-II which is the small form factor and the MDV-III which is the blue one with built in pedal? Is this the same pedal in two different form factors or are there sonic differences? I sort of like the knob you can just turn with your hand but on the other hand I want the best sounding version. I will use this with an analog man BC183 fuzz. Trying to get some band of gypsies like sounds. Just for fun around the house. Many thanks.