In terms of quality, the Roma team is slightly better after being handled by De Rossi, but I doubt the team's mentality and confidence when facing difficult matches because De Rossi is not an experienced coach on the European stage, that is what differentiates him from Jose and I think this has quite a big influence.
So far, Roma has been considered quite a consideration on the European stage, inseparable from being coached by Jose Mourinho and this indicates that a coach's experience on the European stage influences the team's performance.
Even though he doesn't have much experience, especially on the European stage, De Rossi actually has the opportunity to prove how he can lead his team's squad, especially in the play-off round against Feyenoord. It's natural that many people doubt De Rossi, but on the other hand, matches on the Europa League stage are an opportunity for him to develop his quality, talent, abilities, related to coaching. the problem is mentality, I think the AS Roma players have been tested in this competition, plus they have enough self-confidence. especially, after playing a series of winning matches. even though in reality, the team they were playing against was a bottom team. but from a mental perspective, the win really helped. what interests me is the point you said, the difference between De Rossi and Mourinho. we agree, but De Rossi has shown it with his performance. now, Roma is in 5th place, having previously been in 9th position when they were still under the guidance of Jose Mourinho. It's not certain if Jose is able to bring Roma to the right track in the Serie A competition. the point is, Jose Mourinho is now no longer in charge of AS Roma. meanwhile, De Rossi is preparing his team to welcome Inter at their headquarters. plus, preparing for the match at Feyenoord headquarters in the Europa League playoffs later. Let's see, can De Rossi get his team through to the last 16, let's wait.