About Harry, it felt more personal toward Peter than Norman did I'd say. Even Peter never truly bringing Norman to justice was because of his feeling toward Harry. However I'd say that Harry had redemptive qualities even when he was dressing up in his dad's duds. Despite his animosity toward Peter, he never was evil in the way Norman was. I don't think Harry was ever a killer in the same way Norman was.
Norman's original goal was basically to have the ability to be out on the field to get his hands dirty and become a blue collared criminal (while he was already a white collared criminal), just turning his eye to targeting Spider-Man for revenge. Funnily enough Norman actually succeeded in his original goal of being a crime boss in the Spectacular animated series for a good week or so. Though I do wonder why Norman became an Avenger's level threat when something like world domination is normally Otto's forte.