First, they both had a prominent leader, Toussaint L'Overture and George Washington. They were similar in a few ways. They both felt that the government and ruler they were under weren't right and should be amended or removed. Both were well known for their skills as leaders, their ability to organize and train men. They were also well known for their ability to rally their troops. They both showed courage throughout the fight for freedom.
Second, while the revolutions in colonial America and Haiti had many parallels, they were also unique in their own ways. In both revolutions, the rebels revolted against a foreign superpower that was in a weakened economic state in order to gain economic and social freedom. However, the Haiti revolution stressed freedom for everybody including slaves, whereas the American Revolution focused more on the needs of the Bourgeois, or middle class.
Last but not least, the revolutions in both of these countries would have been unsuccessful was it not for the crippling problems faced by both opposing superpowers. The success of the Haitian revolution was due in no small part to the political turmoil brought about by the French revolution. So, French revolution also had an important part in the Haitian Revolution.
In conclusion, both the leaders from the American and Haitian revolution were very well focused and intelligent. Haiti and America stressed different things as a reason. Both revolutions could've been unsuccessful if not for the political turmoil brought by the French revolution.