Higuain > Cavani by a mile IMO...
You never see Higuain leave a match without being very close to scoring or providing assists.. On the day Cavani is lethal but other times he's just not really there.. Don't get me wrong, Cavani is class, but sometimes I just think to myself how a player of that level can leave the pitch without contributing a dine.. (Like when we played Napoli - he scored a penalty but otherwise he was invisible)