OK.. presuming you've read all 54 pages of this?
Full or fin keel?
and now to the various 'fin/short' keel discussion. You may have started another unwinnable argument.
IMO from a pure sailing (esp upwind) perspective, draft "rules". If you can get around with it the maximum draft your boat can be engineered for would be 'best'.. but what's best and what's practical won't likely align so nicely.
Plenty of sailing areas are so shallow that a good deep draft boat would spend more time stuck than sailing. Hence the current popularity of the various shoal draft designs. To a degree I think the current crop of wing keels is as much marketing as design refinement, but moving the ballast into wings does lower the CG and improve righting moment. The various keel/centerboard configurations can offer the 'best of both worlds' for some.
Concentrating the ballast in a bulb hanging off the tip of a short chord low drag fin is most efficient of all, but it can be a difficult thing to properly engineer, and they require a lot of skill to maximize the performance benefit. If such a boat doesn't keep the flow 'attached' there will be ridiculous amounts of leeway because such a keel has little lateral plane to resist sliding sidewise in the absence of hydrodynamic lift.
Most cruiser/racer type boats today will either have a standard deep fin (many new designs do have bulbous keels that get the ballast down low) or some version of a wing/shoal style keel. I think the difference between the two will only be seriously noticed if two equally well sailed similar boats line up, one with fin and one with wing. For the average cruiser/casual racer I think it may be a non issue, and the shoal draft may work to advantage overall.
For ourselves our cruising grounds don't really have any draft restrictions so a deep fin would be my preference. Ten feet of draft would be extreme, of course, but a 6 feet we rarely need to worry about where to go.
Another issue is that not all models even offer both versions.. some manufacturers seem to have concentrated on the shoal draft 'version' exclusively.