Saunders is a better boxer, and as long as he manages to steer clear of the Hail Mary shot, he'll win on points. Before Lee beat Jackson and the Russian,he was on his way out.
He was losing both fights and being outboxed. As for the Quillin fight, once Quillin never made the weight, it meant Jack shit!
Not sure how good Saunders is, probably comes up short against the best in the division, but he knows that, and Lee is worse,yet he's a World champ.