They both had big names in their town. The thing is that John realized he had to admit the sin to make them believe what Abigail was doing was all a lie and made up. On the other hand, Dimmesdale is a selfish man as a minister. He's the one everyone looks up to, yet he is not brave enough to admit to his sin with Hester. Later in the story, Dimmesdale does admit but that is after Hester already had been throwing a lot of pain and embarrassment. John Proctor is such a brave man he makes up another sin that he apparently has done this entire time just to make this witchcraft in the novel stop. This act of bravery has him hung for it but he still has his name in the