Does anyone know the physics behind why Tekno chose to go from the 4.0:1 F/R ring and pinion ratio of the .3 to the lower 3.33:1 of the .4?

Something more than "it accelerates better" or "spins the center drive line slower".

Does anyone have the engineering knowledge to explain why the .4's internal ratio of 3.33 is an improvement over the .3's 4:1? Or is it actually better at all?