Yes, they're different as the others have already explained. But you are right about the sarge, how it takes off revs. In fact, that's actually the point.
Since nick used to be over 500rpm, he started using that to take off some of the revs. And he likes rico because it's harder to get a controllable ball when you have high revs, and rico does just that.
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- Andy
Brunswick...........'nuff said.