Also, one should remember that scoring lots of goals in Spain doesn't necessarily mean that the same thing is gonna happen in Serie-A. Take Barcelona for instance, and look at how some of their most classy forward players struggle against italian opposition, whether it was against Milan last week, Inter in 2010 and Juventus in the past (we have a nice record against Barca).
Higuain is classy, no doubt. All I'm saying is, take into consideration the kind of a JOKE most spanish defences are. It's not a given that Higuain is a better striker than Dzeko. In fact, I doubt it. In my opinion, Dzeko is tailor-fitted for the Serie-A.