Cool question! First, they are both very ambitious characters. They both are scientists who hope to discover something that no one else has in order to make a name for themselves and carve out a spot in history. They are both guilty of not completely considering the consequences of their studies before going ahead with the experiments--Victor with bringing the dead back to life and Alan with studying DNA-regenerated dinosaurs.
On the flip side, Victor's desires to bring the dead back to life stem from a personal connection. His wish was to help others avoid the pain he suffered when his dear mother died from the fever she contracted while nursing Elizabeth back to health. Alan's penchant for dinosaurs stems from childhood curiosity and for the sake of science alone. He continues to debunk previously favored theories as he studies and observes the dinosaur species, their habits, their nesting and parenting abilities and the way they learn.
Regarding internal conflict, Victor must face the fact that his goal has blinded him to the responsibility he has to all of humanity as well as his closest friends and family. As a result, those closest to him die horrible deaths at the hand of his creation. He attempts to right this by teaching Robert Walton not to make the same error.
Alan's conflict is to instruct those on the island that they do not have control over the dinosaurs and that there is a responsiblity to humanity here as well.