Bookmakers are currently pricing this game as follows:
2.40 - 3.25 - 3.10
It turns out that despite Napoli being the favorite in the title race, they are the underdogs in this particular game. I don't even know if it's fair to rate the current champion and race leader as 3.10? Plus, Milan is far from being the strongest competitor and is very far from its best days. For some reason, I'm starting to think that betting on Napoli is the right choice, or that I could take the more reliable Napoli Double Chance.
I don't think it is fair rating on Napoli. Currently they are a better team than Milan clearly. Especially in terms of offense. Besides when we check the head-to-heads, we can see Napoli beat them home and away both last season.
Therefore I don't see any logical reason to underrate them in odds.

Milan might seem to be improving recently but I wouldn't trust them in this game. Currently it is 3.20 for Napoli and seems worth a try for betting...
I think Napoli is a better side than AC Milian,they won the trophy last season but luckily because Inter Milian were more closer but just that luck wasn't on their sides.Sometimes Odds doesn't matter nor determined the best outcome in a game. I remember vividly years ago when FC Locomotiv Moscow was playing against a small team,and in that game,L.moscow was given 3.29 odds because they were playing away to win against a smaller team at Home.i simply didn't allow the odds to bother me because I knew FC Locomotiv Moscow is stronger,more inform and will win the game. However the odds difference was because Napoli will be playing away against a strong AC.Milian.