I finally had a chance to do a side-by-side comparison of these two pedals, the EBS Multi Drive and the Roger Mayer Voodoo Bass. In short, I'll say both were very capable of producing extreme crunch, but the Multi Drive allowed me to scale back as much (or as little) distortion as I wanted, whereas the Voodoo Bass sounded pretty extreme even at the lowest settings. Also, the EBS pedal sounded just a touch better in the lows. But, both pedals had tremendous distortion capabilities. If you're in the market for a distortion pedal, I'd list both of these at the top of my list! Sorry this mini-review is so short, I'm off to a job interview. Wish me luck!