There is some software available to analyze hull performance. When toying around with ideas, it can be a fun exercise to run your hullshapes trough it. A hull canted outwards should be inferior when sailing the boat flat.
And what is really good about this program, (besides the fact that it is specifically for long thin catamaran like hulls) is that freeship can output the data directly to it, so if John can post his hull file somehow, I am happy to run it through michlet for you.
But as Wouter said unless you have a spec, i.e. something to aim for the results won't mean much.
