Both Barcelona and Napoli are struggling, performance-wise. Their underperformance makes this match more uncertain.
I agree with you friend and i think you are missing out on a detail, yes Barcelona and Napoli are struggling, but Barcelona are worse off because they have more injuries and cannot score many goals, while Napoli has Osimhen back, fit and also amongst the goals!!
I think Napoli edges this, 2 goals to 1.
In the first match, it was Barcelona who got the advantage in Italy. The rematch will be in Spain, so I think Barcelona will be the team that will take the advantage. Napoli will have a difficult away game. The strengths of the two teams are very close to each other. That's why I can say that it will be a difficult match to predict. It will be such a match that both teams can win. Maybe it will go to penalties and the penalties will decide the team that will advance to the next round.