You always have more awareness in nightmares . You have more control over your feelings(fear/anxiety)When you are about to be caught or something gets to horrible. You can peform some of the reality check. You would put your faith into the reality checks instead of just peforming them without feeling. Anyway I will try it out . I always have more nightmares them normal dreams. When it gets to the point where I can just become lucid then I won't need to experience the nightmares