Hitler was a socialist, Trump not. Hitler served in the military, Trump didn’t. Hitler did not start out rich or become well educated. Trump is both. Hitler hated the Jews, Trump is on good relations with Jewish business partners and his son in law. Hitler was a vegetarian, Trump eats meat. Hitler (may have) married only just before suicide and had no children. Trump has been maried multiple times and has lots of children.
Similarities: Both refrain from alcohol, both are/were men.