With no much doubt, I think Roma will even be a challenge to Manchester United, I know city isn't a small team but at some point even their top players where substituted yet Manchester United failed at getting it right. At this point it becomes very necessary Manchester United works hard towards every form of improvement without hesitation.
The competition between Manchester United and Manchester City and the performance of Manchester City in that competition is nothing to be displeased with as it was only a warm-up match. The main stage play is yet to start when each team plays some of the main stage matches to get an idea of the overall tournament performance of that team. Manchester City will not only do well in the Premier League next season, they will also do well in the Champions League. Among the teams that participate in the Champions League, Manchester City, Real Madrid, Bayern Munich are the favorites, but other teams outside of these teams are not doing very well. In the 2022-23 season Inter Milan did well in the Italian league and they qualified for the Champions League final which is a big achievement for them but next season I would naturally put Manchester City ahead of the big teams.