I agree that it is going to be a simple and easy game, they are not even remotely close in talent and Napoli has been great this year as well. Sure their previous games look like Napoli was better, but this year Napoli is even better than their previous years which shows that we are talking about a situation where Napoli will have just a field day of practice and not even a real game for them.
This of course could be an issue if they underestimate their opponent and not play properly, if they do that then any team could beat Napoli as well. So what they need to do is, know the fact that they are better, but still play with %100 so they could end up winning.
Spalletti managed to bring Nopoli to a good team, in recent years Napoli have always failed to reach the Scudetto, as far as I remember they have been runners-up four times since the 2011/2013 season, this time Napoli has a big chance to end failures in several years before to reach the Scudetto, because the difference in points with the challengers in second place in the standings is as much as 15 points and this is an extraordinary record for Napoli.
22 games have run so far, while Napoli has only suffered one defeat against Inter Milan, with the number of games remaining and the point difference they have with the challengers in second place in the standings, Napoli's chances of reaching the Scudetto are enormous and almost certainly belong to Azzurri.