Wins in the first, second, and third matches don't necessarily mean either team has the best chance of competing for the title, as there are still many considerations that every team in Serie A must go through until the end of the season. Inter Milan has always been able to put up a fight in Serie A in recent seasons, but Napoli's dominance so far has been far superior, so what needs to be considered is how Inter Milan can consistently perform.
Last season, these two teams were involved in a fairly tight competition, with both vying for the best. Napoli itself was able to take advantage of the situation because Inter Milan had a greater focus on the Champions League so Napoli took advantage of the situation and managed to achieve the Scudetto, something like this that Inter Milan needs to avoid this season.
Inter Milan has made many changes, potentially improving or not, but their first match proved that their quality is still very good this season. It just depends on how they maintain their consistent performance until the end.
Napoli did bounce back last season and immediately won the Scudetto, but this season, I think things will be different. Not only Inter Milan, but teams like Roma and Juventus have also improved, and that could pose a threat to the top teams competing for the Serie A title this season.