How is Will Ladislaw different from Edward Casaubon in Middlemarch?

Will Ladislaw and Edward Casaubon are contrasting characters in George Eliot's novel Middlemarch.12

Will Ladislaw is depicted as a young, headstrong idealist. He is in love with Dorothea Brooke and eventually marries her after Casaubon's death.12

Edward Casaubon, on the other hand, is a middle-aged, pedantic, and pompous scholar. He marries Dorothea Brooke primarily because he needs an assistant for his stalled magnum opus, Key to All Mythologies. Casaubon is portrayed as ineffectual and becomes jealous of Dorothea's friendship with Ladislaw.123