In my study I didn’t feel much break as much as I felt breaks in different philosophers like Satre, Kierkegaard, and others. I will give example of Satre since I know him the best, Satre had a break in from Transcendance of Ego and Search for a Method to Critique of Dialectical Reason and onwards until Situations IV. Clear differences emerge in the way he uses existentialism originally being closure to Communism later being more of a CIA puppet, very oversimplified but yea.