I flew a three blade for a couple of years, 15.75x11 (Lockhart repitch). Then I got an airplane that just wouldn't track well in and out of radii. Went to a two blade, and it transformed the airplane. Some planes just need the additional diameter of propwash. Went to a two blade on my backup, and it worked better on that also. Every airplane is different, and responds differently to different props. An 18.1x10 works as well in braking as the three blade. Two blades are heavier and take longer to spin up, another consideration. But a two blade is also more efficient than a three blade.

Your mileage may vary!