Interesting question. I think Harada was the better fighter overall and had more boxing ability than Zarate, but power is the great leveller in this one. Zarate CAN hit hard enough to knock Harada out. Harada never had the greatest chin (though it was pretty good) and there have been quite a few fights where he was shaken up or taken out. A peak Zarate might be able to take him out if he hits him just right, which I fancy on happening over the 15 round limit. Could see this one going either way, and fights would probably be split in a series between them but I'm thinking Zarake ko sometime in the last 3 rounds being the most likely outcome.