Three Books Said 64.3%, 63.1% and 62.0% on the Same Team. Strip the Vig and They Agree to 0.26 Points

Odds data ships two probabilities per outcome and only one of them is comparable across books. I pulled a real NFL slate from DraftKings, Pinnacle and Kalshi and measured how much of their apparent disagreement is just the bookmaker's margin — plus the one field that tells you how much the sharp book actually believes its own number.