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rootboy - in this case yes, overall, no.
The 91 Pin has 175 cranks and I can tell. The RockHopper has 172.5 and is the standard against which I judge. Granted, gear/inch are never matched between bikes, but after riding the RockHopper home and jumping on the Pin for a cool down ride, I could tell something more than the gearing, tires and bike overall response was different, like my feet were going in a bigger circle!