What are the differences between Hans and Proffessor Otto Lindenbrock?(characteristics, not appearance )

Hans is a calm, wise, stoic man, and does not talk much during the trip. He also saves the lives of the entire adventure party numerous times. Professor Lidenbrock is hardworking and optimistic, never giving up on the journey to the center of the Earth. He is also stubborn, prideful, and single-minded in his endeavors.