How Does Epicurean Philosophy Differ From Stoicism?

Short Answer: The differences between Stoicism and Epicurean philosophy are deep and profound. Modern advocates of variations of Stoicism tend to blur the differences, but the ancient authorities who knew both systems well considered them to be totally incompatible, especially in terms of the goal of life and the role of reason in the determination of truth.

For a detailed treatment of many aspects of the differences, see this section of our wiki. 

Discussion of this question is here.