I also don't think that Napoli will be able to win Bologna due to their poor performance with Verona, it makes me doubt their strength. However, it is possible that Napoli might be able to defeat Bologna because they might have learnt from their Mistakes. Bologna is also a team that cannot be predicted in their next match.
The rest predictions are possible to come out as predicted but it is still a 50-50 chance of coming out that way.
As a result of Napoli's defeat in their first week in Serie A, many people now have doubts about them in the coming week. But we can't actually give Bologna a favorite because they couldn't beat Udinese in the first week. even though Bologna was the host in this match. And even Bologna only scored a goal from a penalty kick. Meanwhile, Udinese equalized the score with a regular goal. So I think Bologna is also difficult to predict as you said. So the Napoli vs Bologna match will indeed be the most difficult match to predict. because both of them were not very convincing in the first match of the season. Maybe I'd rather skip this one.
Statistically Napoli is the favorite for this match and not Bologna. Starting off the season on the same level doesn’t mean they’ll have an advantage over them or be equal in experience when they play in this match. Napoli seems to be the favorite whether they did well in their first match or not, this is the second match of the league and each team will come more prepared for a win after they’ve both lost in their first matches. Bologna is a smaller team to Napoli when compared base on past experience and victories by each team. The match could turn out to be something else like unpredictable but Napoli has a better chance than the chance that Bologna has in this match.