Marquez in a tactical boxer/puncher stance type of fight. Valero in a street brawl type of fight. If you could pick one of the hardest 50/50 fights to call, this is it. Marquez has the boxing skills to out-slick Valero, but will Valero give him a chance to do that? Marquez would lose if he went to war like against Diaz most likely. I also give the edge in experience to Marquez. If Mosquera could test Valero, Marquez could three times over. Actually, given the experience that Marquez has had with Manny Pacquiao, give me 60/40 favoring Marquez out-boxing Valero rather than a 50/50. 60% says Marquez by decision, something like 116-112 twice and 115-113. But 40% says Valero could end the fight with a KO at any point in time. Even against Marquez. It's the experience of Marquez over the power of Valero, but only slightly.
And gold coins to all boxing fans whoever should win this. A rubber match with Manny if Marquez wins so that we might get a definitive winner in a trilogy, (although I doubt it) OR a potentially electrifying Corrales-Castillo I type war should Pacquiao and Valero ever meet in a boxing ring. A match that could be the most exciting fight in boxing!