I have owned them both, almost passed on getting one of the SBMV because I already had the MGMV. I have seen the MGMV go for $500 range lately and that's really good. The SBMV run $799 new.
When the last batch of SBMV were built I jumped in at the last second and I am very glad I did. The cup size thing makes the unit soooooo much more versatile to me. I really like being able to quickly move from a thick lush slow vibe to a thinner faster setting with the click of a foot. You should be warned - if you are prone to seizures you might want to stay away from faster vibe settings - the flashing light on the SBMV is dangerous!
Is the MGMV a bad pedal - not in the SLIGHTEST - I could have easily stayed happy with the one stomp, however, now that I have drank from the 2 cup size
I would not be able to return...