They have characterization.
Soule's Diana is strong, compassionate, and independent. She's trying to make her new relationship work and is trying to overcome the cultural and philosophical differences that separate her and Superman.
Johns' Diana is an arrogant barbarian who believes that the answer to all of life's problems is "Stab it repeatedly in the face." What she'll ever do if she encounters the problem of a facial wound? I'm afraid to even contemplate.