It's very true, Inter is in the UCL, and will play Vida in another week, however I agree with you that it will take away energy from Serie A, while Napoli will be more rested and with more energy to focus only on Serie A, therefore the team for me will get much stronger and in better shape, Inzhagi's Inter is a team that has everything to win both tournaments, however consistency is something that the leading teams in these tournaments of all leagues are suffering from.
Reluctantly i must say that Inter can succeed in the company. Let's say that as a team is very well, he turns perfectly but already for at least two years.
Such a team can safely go to the Champions League final and also play the Scudetto.
Let's say that his strength is the fact that he is constant in what he does