On a 12x6 prop, is there much diffence performance wise between the 2? They both have different shapes, the MAS looks better with the squared off tips and black color for the T-34, but the Magnum book suggests using the APC prop, which would look better on my Deweyville, more period like than on the T-34. So far I have run up the Magnum by the book on the suggested prop for it, but haven't flown yet. My OS 52 FS runs an 11x7.5 MAS and works just fine.

Other than Opinions, which is what most responses will likely be , is there an actual performance variable that has been documented?