I like it too. Off the top I'd have to pick Ruiz in this one. For the same reasons you mentioned. Ruiz can take a good punch, and has shown he can get back off the canvas. Not only that. He's also busy, and Wilder isn't adept at fighting while backing up. Wilder's victory over King Kong Ortiz is discounted by many because of Ortiz's age... but still not very many fighters were lining up to fight Ortiz. But to me that's a plus for Wilder. Still... I think Ruiz catches Wilder enough to win by late stoppage.