I started out using MA K-series props on my airboats and when I got motivated to go for speed I went to APC. What I like about MA props is the fact that if you knick something or strike something, they shrug it off and hold together fine. APC on the other hand, generally, if you knick them ( such as a 4-stroke chucking the prop ) you probably should just chuck it in the trash. APC is more efficient, but for fragile in a way. MA props in my experience, flex too much and I have "heard" their pitch figures are a bit short of what are marked as.

In a plane, I probably would still run APC props except for something scale. MA scimitar/S-2 props look very similar to APC and probably perform well though wouldn't look "right" on a scale ship.