Similarities: They were both attempts at overthrowing their government, a monarchy. They were both inspired by the enlightenment.
Differences: The French revolution was inspired by the American revolution. The French revolution was much more gruesome than the American revolution. The French revolution ended in an empire while the American revolution ended in a democracy.
Differences: The French revolution was inspired by the American revolution. The French revolution was much more gruesome than the American revolution. The French revolution ended in an empire while the American revolution ended in a democracy.