Right, but to make the experiment fair you would have to add the same area to the main of the uni, unless both boats are overpowered already. There is no proof in any of these arguments, just examples and applied logic.
I am certain there are crossover points on the performance plots for both types of rig, and I have some toughts about where they might be. But until someone do the tests and produces some real numbers.. 'nough said.

I still think doing a carbin fibre RIB is outrageous, but nobody seems to have notices in all the uni vs. sloop noise.