RE: APC Props?
Who says they are "better"...? Better is a relative term... it depends on what you are looking for.
Sport APC props are optimised for low noise production. The prop blade shape they use typically makes for less blade area when compared to other "square" bladed props. That's the reason they turn up higher than other brands: less blade area, means less load on the engine... but also less thrust.
They also use "true pitch", opposed to "average pitch" used on most wood props and the likes. Average pitch makes for higher pitched prop tips, which also puts more load on the engine.