Gilardino is NOT better than Amauri, its just if Gilardino was offered to Juve and to Inter, Juve offering 3 million euros a year, and Inter offering 3.5 million, he would not have to think about it, he would not try to leech as much money off them as he can.
Amauri is taking too long to make a decision, and is going to go where throws the most money at him.
Amauri is probably the better overall player, but like that article i posted, Amauri is a mercenary and goes where the money is. Gilardino is actually a Juve fan, and thus would be more passionate about the team and try his best.
It all depends on the price at the end of the day. For Gilardino i would not pay more than 7 million euros. While if to get Amauri we have to co-own Giovinco, Marchisio and De Ceglie plus give them money, then Palermo can go fuck themselves.