It's a shame this matchup never happened, I wanted to see it. Obviously both of them are shot to pieces now. Had they fought circa 2013-2014, when both were in their primes, who wins?
I could see that. For me, I think Kell peaked a bit higher and was tad bit better. He wasn't as fast and as athletic as Thurman, but he was more technically proficient, more accurate, and a bigger hitter imo. If we can assume objective judging, I think Brook would have taken a decision in a close fight. Both would hurt the other at some point, but overall I think Kell outboxes Keith, in a battle of two lightskinned brothers with lisps.
Id go with thurman in a close one. He's more of a fighter than kell, amd that would be the difference
I think Brook edges him. Thurman is faster and more athletic, Brook was the better technician and had a better ring IQ.