In which way did the black power movement most differ from king's movement?

King had a non-violence movement. They did things like sit in, practiced civil disobedience, and etc. When the police arrested them or acted violently towards them they would resist or fight back. This movement was successful. 

The Black Power movement deals with violence. they thought that Kings way of getting rights was not helping so they took matter in their own hands and did things violently. This is why their movement wasn't successful. 

Interpreting the results of his experiment : )