Every ceiling fan has some type of blade pitch, whether it's a specific degree or a variable / airfoiled blade. Blade pitch is based off the degree at which the blade is tilted to. The higher the degree typically the stronger the motor to push that pitch thus creating more air movement.
Larger motor plus a larger blade pitch equals more air movement. Compare the fans motor size with the blade pitch, and check the CFM and you will realize what the combination can truly do for your application.
Variable Pitch / Airfoil Blades are very unique in terms of ceiling fan design. Some include the blades as a part of the motor housing while other have blades that are separate but have a unique pitch to them not similar to the standard blade pitch degree. These blades function quite differently from the standard blades as the standard blade pitch push the air while a variable pitch scoops and pushes the air simultaneously.