Based on experience with 7 Aeromsters, 2 Phaeton 40's, 2 Phaeton 90's, 1 1/4 scale Moth and two other bipes, ALL flew best with the upper wing at about 1.5 degrees less incidence than the lower wing. In fact some went from absolute dogs to pleasant fliers by just reducing the incidence of the upper wing. Now all these planes have the upper wing leading the lower wing, if the stagger were negative, results may be different. If you were flying free flight or going for maximum lift versus minimum power, the the other way may prove better but; for ease of flying and pleasure, I like the upper wing at a lesser incidence.