What a fight it would be but Yafai is a bit special and would win the fight to big and strong over 12
Yafai is a very big bantam so for him to get down to superfly would leave him seriously weight drained especially over 12 rounds, Butler would stop him with body shots in the late rounds :good
I'd go for Butler at the moment. I think he'd see through 2 or 3 rounds where Yafai is pretty dangerous, but I think you can take the edge off that speed and power. Then we've seen him look a little less convincing. There is always that tendency to favor the guy with the more obvious stand out attributes, but I think at this stage Yafai has a lot of developing to do to get past somebody like Butler who is steady, big, doesn't make many errors...over 12 rounds.
and he looked absolutely fine at the weight. I think Butler is a very good fighter, but for me Yafai is going to be a genuine World Class operator and would get the better of him.
Yafai with ease, think people going over board about Butler, he is a good fighter, but nothing special.