what are some similarities and differences in actions and attitudes between Hale and Proctor. and Proctor and Corey.

All these men have their own value base. They do not accept religious dogma at face value. They are able to see through the hypocrisy of this frenzied witch-hunt and the court's own self-serving motivations. Hale takes longer to see this because he is much a part of the institution he ends up criticizing.