Matt and Gina, on their Blade F16 with jib, already have beaten several A cats, I-20's F-18's, boat for boat, around the same Windward-leeward course in the Alter Cup Area D eliminations at GYC in November.

Uni is fast in lighter air, but when it starts blowing and you need to depower the top of the sail, the boat with a jib can stay powered up in higher wind, due to the lower center of effort of the jib vs. the taller masts of the Uni rigs.

If you have a fixed sail area, I think putting some of that area in a jib vs. at the top of the mast makes more sense but only if you are out in more than 10-15 knots of wind. Below 10, it's probably faster to keep the sail area up top on the mast.