How do Dante and Mondego differ even though they are friends?

Mondego is corrupt on the inside. He does not share the honor that Dantes has. Military glory brought him a fortune, and he changed his name to Count de Morcerf. He commits suicide after Monte Cristo reveals his military treason. He betrayed his benefactor in Greece, Ali Pasha. He surrendered the Greek city to the Turks, and sold Ali's wife and daughter into slavery.