Well, for one, the French Revolution was the people of France overthrowing the government (specifically the monarchy) and establishing a new one (a republic) which ultimately ended with the reign of Napoleon, which was a dictatorship.
The American War for Independence was the Americans fighting against Great Britain to become an independent country and be free of their rule.
The main difference between the two is that in the French Revolution it was the same country but with a new government, and in the American War for Independence, it was a whole new country with a whole new government.
I hope this helped a bit, it’s all I’m able to elaborate on at the moment.