The primary difference between the aerobatic and non aerobatic versions of the same propeller is the direction of blade travel caused by the governor. In a non aerobatic prop the blades go to fine pitch (high RPM) when there is no regulation supplied by the governor due to the action of internal springs. These "regular" props will be in fine pitch when the engine is shut down. Aerobatic props are the opposite. They are in course pitch with no input from the regulator as they would be seen sitting on the ground. The reason is in the event the governor looses oil supply in a negative G manouver, a non aerobatic prop would be driven to fine pitch by the internal springs potentially causing the engine to dangerously overspeed. With an aerobatic prop, the loss of oil to the governor during a negative G manouver causes the prop internal springs to drive the blades to course pitch, reducing RPM. If both props have the same blade, the performance will be identical for either throughout the positive G flight envelope.