In my opinion, Yuh's strength, defence and solid punching (that seems hurtful without being snappy) would keep him in a fight with Chang, and Changs usual change from whilwind to switch-hitting fluidity would be stunted by Yuh's quality combinations (punctuated by a series of well-placed textbook punches) at mid-range, as Chang would have to be all-out whirlwind over the last 3, winning a close 15 round decision or an uber-close decision over 12. Based on what I've seen of Yuh, which is less than I've seen of Chang, admittedly. But he seems a solid all-rounder.