Yes indeed, it seems inappropriate to compare De Rossi with Mourinho because after all, basically Mourinho has had a lot of experience in his coaching career and it is different from De Rossi who can still be said to be new in his coaching career. But even so, De Rossi as an AS Roma legend is also able to provide good results for AS Roma because with De Rossi's success last season also made AS Roma manage to finish in sixth position and get a Europa League ticket.
Thus, maybe that also makes AS Roma quite active in this transfer window by buying several players. Of course, with some of the new players brought in, it will be a hope to be able to make a good contribution to AS Roma next season. Because AS Roma who will also have a schedule on, ofcourse, will need a rotation of players who thus also, AS Roma need second-tier players who at least also have good quality to keep the team's performance good.
Mourinho is a class above, but he gets his latest offers from new teams more because of his authority than his results. It was noticeable how Roma's game improved after De Rossi took over. De Rossi has little experience but he has the character that makes players give their all on the field. It is also an important trait when a coach can motivate players to perform at their best, and since his arrival Roma have become more productive, which makes the matches more entertaining.