@KZW I'd swap with you if we were closer!
The deep fin keel with the batten main mast is closer to the wind and clearly faster than my wing keel and roller furling main. That being said, I can get out of the marina in the winter. Here in Choctawhatchee Bay, with prevailing winter winds from the north, the water drops almost 1.5 feet in the winter, leaving just six inches under my wing keel. The deep fin just wouldn't go into my slip. As I get older, I find it real convenient not to leave the cockpit to furl the sails. That being said, when Whit's End goes by me on Wednesday nights, I do pine for the conventional main, and fin keel. In truth, I'm better off with what I have. One must know one's limitations
There is another C-310 I run against on Wednesday's. Rummerful has the wing keel, furling main, and a three-blade feathering Kiwi prop. I used to have a fixed three-blade (very drag inducing - fully 1/2 of the hull drag) and went with a two-blade a year ago. Amazing Grace and Rummerful are now close to even, with Rummerful just a bit faster according to the numbers. It all depends upon how much attention we are paying to the sails and helm. Sometimes story telling and hydration just seem to get in the away of sailing the boat to its true potential.