Cavani is a work horse, just like Drogba is. Falcao is definitely more of a threat due to his superb heading skills and great finishing, so he would probably get more goals in a season, but I'm sure that Cavani would help the team more and strike much more fear into defenders eyes. (Surprisingly though, although taller, he's actually lighter than Suarez! So he'd have to use his height well to bully defences.) I've got some friends (ooo shock, I know) in Italy though, and the feeling over there is that Lavezzi will leave Napoli this Summer, Cavani the next, and then another season or 2 before Hamsik leaves. He'd be a nice addition though, definitely.