One major difference between the two is that the Spanish colonies were much more intensively settled and a much more developed economy was created there than in French colonies. French colonies were sparsely settled and were used mainly as ways to trade with the Indians for furs. France was interested in colonizing and in securing the benefits of the fur trade. That meant establishing trading posts and trading centers. The Spaniards were only interested in discovering gold that had already been mined, seizing it and shipping it back to Spain.
I hope one of these helped!