Bookmakers evaluate the chances of teams as follows:
2.90 - 3.50 - 2.38
I think it's fair that Napoli is the favorite (how could it be otherwise with such a phenomenal scoring game), but 2.9 for a Roma win looks tempting. It seems to me that Roma should win more often in such games than 35%. There are no guarantees, but in terms of distance, I think it's profitable to bet on Roma.
Don't know why you seem tempted by the higher odds for Roma compared to Napoli. KTCampions, Napoli are a consistent team so far and it is difficult for me to justify that they will lose to Roma who have started well in recent match. Napoli are unbeaten in their last 10 matches in Serie A and I think that good trend will be maintained by Napoli in this match.
It may be true that something can change in a match due to chance, but Napoli are a team with a higher goal-productivity than any other team in Serie A at the moment. I think Napoli won this match, but Roma are a team that has improved now. 7 wins in 10 matches and only lost 2 and the rest were draws are good statistics from Mourinho's team. Interesting to look forward to.