Navin R. Johnson v. Forrest Gump
Seriously. Two goodhearted simpletons from the Deep South raised under unique family situations. Both leave home on a journey from rags to riches; each has multiple adventures, each eventually returns home to family. Both get checks for money that they don’t understand. Both love women who leave them and don’t come back into their lives until after they hit the mother load.
The difference between the movies is obvious but there’s a remarkable similarity between the characters.