My results
Direct apples to apples comparisons, I don't have. We've done well with our fin keel non-furling mainsail, feathering prop, and 135% jib. But the local C30's are given extra time under PHRF, and it depends on conditions whether we can do well. It's hard for us to beat a 150% on a C30 unless the wind strength is favorable. In one race I actually sailed away from a widely mixed fleet in drifting conditions to lead by about half a mile, only to be overtaken when the wind picked up. Yet most C310 skippers like their boats in higher winds. All in all we've had some competitive races with C30's, winning some and losing some, even boat for boat. That's about all I can offer.