Tyson would win. He was a combination puncher in his prime with a pretty good defense. And we're talking about a flyweight against a Heavyweight right Sheer mass alone Mike would win this fight. He could very well kill Lopez. People talk about weighing in 5 pounds over the weight being an unfair advantage. Imagine Tyson weighing 100 pounds over and it being legal Tyson would beat Lopez badly. And it may have nothing to do with style or whatever just body mass alone...