It depends on what type of "faith" you are looking up.  If it is religious faith, it is exactly the same.

(Religious) faith: "strong belief in God or in the doctrines of a religion, based on spiritual apprehension rather than proof."

Superstition: "excessively credulous belief in and reverence for supernatural beings" and "a widely held but unjustified belief in supernatural causation leading to certain consequences of an action or event, or a practice based on such a belief."

There is no difference.