If you have a bar room brawler like Feliciano from time to time hit you at will and trouble you, you are going to have problems. If you fall to the canvas, grimace with pain, and on the verge of crying, it shows the lack of mental durability. Cintron has improved technically (better use of jab, better defense), but he still wing looping shots and keeps his left hand low leaving him susceptible to Margarito's right. Plus, we do not know what kind jitters he still has getting obliterated like he did in his first fight with Margarito.
As for Margarito, I believe he is hungry. He was out-hustled by Williams. If he started early, he would have won the fight. I believe he learned his lesson and blasted Golden Johnson early. Though he is only 30, he has little time left (esp. in this division - he started at 16 and the way he fights). I feel he is going to start early and put Cintron's ass under fire. Plus, Margarito is durable. He ate shots from Cintron in the first fight and walked right through them. And his competition has been more stiff since they last fought (Paul Williams and Joshua Clottey). The best fighter Cintron fought was a spent David Estrada. Wooo... Knocking out a guy who has been knocking out cans in Argentina doesn't impress me.
Margarito by mid-round KO