I had 2 and 3 bladed props on a prior Long EZ - the 3 blade was actually faster and theory says it should be slower. It was quieter in the cockpit as the exhaust is bouncing 6 one pipe at a time instead of two times per rev at the same time. It was smoother.
There aren't many manufacturers of 3 blades. The Performance blades seemed a little thin and people saw cracks appear and took them off out of concern... Catto has great 3 blades.
The big issue is carrying them. You can't carry them in most of our tandem planes, you can't put them in a baggage pod, and shipping is a nightmare that seems to be going up in price over time. With a pusher there is always servicing of props - they eat safety wire, washers, bolts and even tools - and need work.
Beagle
