Napoli are able to perform well in Serie A this season because they don't have a busy schedule. Napoli have given full focus to Serie A matches only. And players are getting enough time to prepare before every match. This is why the Napoli team is able to have the most consistent performance in Serie A. However, Napoli unexpectedly lost the last match.
Inter Milan are trying their best to perform well in both Champions League and Serie A. This is why Inter Milan's performance in Serie A has been somewhat erratic this season. Inter Milan failed to hold the top spot in the table. Inter Milan is 1 point behind Napoli.
Inter Milan have a great chance to take the top spot in the Serie A table. Inter Milan will be able to occupy the top spot in the points table if they can get 3 points against Napoli. Although both teams are almost equally strong in this match, I still prefer Inter Milan.