The first part of the post is right. Vitali has 20+ pounds on Wilder. Their frame is different. Wilder has pin legs, and a narrow waist. Those narrow waist types do not take good body shots for the most part.
Not many guys I'd pick to stop Vitali by whichever method. I dont know that he was vulnerable to body shots?Did you decide on this MO because his chin was so good?
He definitely did not lose every round.. But yes Byrd was stunned , as was the HBO team as they had no idea that Vitali was injured. Maybe he just quit from exhaustion