It is very clear because Napoli's consistency this season has been extraordinary and in Group A the Champions League has also been extraordinary by winning two games so far and it will be very possible for Napoli to win another game in the Champions League group stage against Ajax. This proves that Napoli are already much better than Liverpool who are in the same group as Napoli for this season.
Napoli were really good at UCL this year, we've seen that in both games they've played. Ajax is a young team with a quality squad, but they lost Anthony compared to last year. This greatly reduced their attack power. They also sold Haller, last year Haller had a phenomenal performance. This year Haller is unable to play in Dortmund due to health problems. As for Napoli, they will be able to beat this Ajax.
We have seen Napoli beat Liverpool, which was a big deal but we have to also accept that something is wrong in Liverpool these days and I do not know what would be the benefit to Napoli to say they managed to beat them. On the other hand we have Ajax which is getting a bit shredded apart, it is looking like they lost too many players and manager inside just one year and that’s going to cause a lot of trouble for them.
It means that we need to realize that Napoli is a better team, but it’s not a clear one yet. I would still bet on Napoli to be honest, it is an easier bet but that doesn't change the fact that we need to be careful with these bets as well.