I still think Inter Milan is the strongest team in Serie A this season. However, Inter Milan's overall performance has been a bit erratic and weak. If Inter Milan could have maintained their performance in the last few matches, Inter Milan would have been at the top of the table now. Inter Milan has lost points in two of the last three matches.
However Inter molan still has a chance to grab the top spot in the table. Inter milan is not far behind Napoli. Inter Milan is only 1 point behind. If Inter Milan can continue their winning streak, they will be able to grab the top spot in the table very soon.
In my opinion, Inter is still the strongest in Serie A and still performs stable like last season, but this season the competition is tighter because Napoli surprisingly performed very well this season after a series of bad results last season, moreover as you said that Inter Milan still has the opportunity to seize the top position in the standings, in fact Inter has almost won it many times, only sometimes Inter wastes the opportunity, and because the difference in points between them is only 1 point if Napoli draws again then it is another opportunity for Inter to overtake, the journey is still quite long so it is not certain who among them will win the scudetto.