Ditto on Chris' last two points.

We found that the 15x6 APC gives MUCH quicker throttle response, while not giving up much in thrust/torque.

That 16x4W boat paddle does pull stumps, but it really howls and takes time to spool up.

One man's drink is another man's poison. The only way to KNOW is to try different props until you find the one that suits your desired flying style.

Steve