Their vertical and broad jump are similar, Kupp has him by good margain on 20 yard shuttle. Watching Ridley run routes as I prepared for the mock draft, my comp was Kupp. They both have great release techniques and vary the speed of their routes to gain separation. They both have quite a highlight reel of circus catches due to body control. In short, they are legitimate #2 receivers if you have a freak on the other side.