Silver is a selfish, cheating pirate who can be very bad if needed. He is a pirate, an adult man who has traveled through many different places that have given him vast experience about the world and about people. Jim, on the other hand, is a kind and charitable boy, who helps his mother and who has been taught to be honest in all his actions.
Despite being such different characters Silver and Jin have some similarities. Both are adventurous, courageous and have a strong desire to achieve their goals and have a good life.