I think Nakata is better since he did made some contributions in Perugia AND Roma, which is not easy since he had to fit into a new team. If Nakata can find a comfortable position maybe he can display his true talent next season.
Definitely Nakata has proved to be the better. As for Nanami, he has not been lucky this season, Venezia has changed coaches few times this year and the tactics have shifted everytime. On some games Nanami doesn't even make it onto the bench. He is asking to be transfered at the end of the season. Some of the clubs that he is looking into are Serie B teams that will be playing in Serie A next season.
I heard that Ortega of Parma might move to Napoli counting that they make it into Serie A next season. If this happens who is going to fill that role???? I hope it's not Nakata or Totti. any thoughts anyone?