Provided the Korean Hawk was motivated, I say he wins a clear decision. Chang was slippery enough to take the mustard off Carbajal's bombs while swarming him with shots of his own. Carbajal's durable, so I think he lasts and remains dangerous throughout. But yeah...I got Chang in this match-up.
If a completely past prime Kwang-sun Kim would have his way with Carbajal, then I see no scenario where Carbajal beats Chang.
Great fantasy match up between my all time favorite, Carbajal, Vs the best to come out of Korea, Chang. Don't know if it's bias having watched most of Carbajal's fights, but I think his size, strength, experience, level of competition, and rat tail would be too much for Chang.
