IMO, the only difference is how much lighter your wallet will be if you buy Record over Chorus. The difference between the two is so tiny that it might only make a difference if you're a professional racer and you're losing races by tenths of a second- and then if you're a professional racer you'd be sponsored and be racing on the parts you're given.
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Jeff Wills
Comcast nuked my web page. It will return soon..