I would also suggest that you try both of the props on your engine and plane combination and see which one works better for you.
The APC prop design is aerodynamically more efficient that the Master Airscrew prop. But the different prop designs and brands behave differently with different airplane designs and engines. One prop may perform better than the other depending on the engine and airplane. For example the MA prop might outperform the APC prop with certain engines where the prop goes outside the powerband of the engine. Or a more draggy plane such as a WWI biplane may perform better with a MA prop than a APC prop or vice versa. Also the APC props tend to be more quiet in operation than a MA props as the aerodynamic design lends itself well to reducing prop noise. Prop noise can be important at some flying fields where noise levels are important.

I tend to prefer the MA props more than the APC props with larger engines, as the APC prop is a razor sharp scimitar blade and it makes me feel like i'll lose more fingers with it, should an accident happen. But the APC props tend to work better than the MA props.