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.
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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.