Compare and contrast the Hitler and Stalin Dictatorships up untill 1939. based on these comparisons are they more similar or not.

Compare and contrast the Hitler and Stalin dictatorships up to 1939. What were the most important similarities? What were the most important and differences? In light of the indicators you chose, were they more alike or more unlike one another?

Arguments should be built off of the sources:
Sheila Fitzpatricks Everyday Stalinism
Gilbert and Larges The European Era