Feels like the more apt comparison may be Andy Reid's last years in Philly when his team got Mike Vick, who was clearly out performing old McNabb and Nick Foles, but he stubbornly kept playing McNabb instead because McNabb's floor was much higher than Vick's, Both coaches are undeniable schematic geniuses but seem to fail in the personnel management/ team-wide aspects of the coaching experience.
Andy Reid stuck with Alex Smith an entire season in lieu of playing Mahomes and, while many people will argue that sitting for a year helped Mahomes become arguably the best pure passer of all time, there's a good chance that he would have been just as amazing eventually regardless of him watching Alex Smith check down and dink-and-dunk his way down the field for sixteen games. I'm not going to say Trey is the next Mahomes or anything but the situations are not entirely dissimilar (until Mahomes proved to be so ridiculously good that Andy had no choice but to trade Alex)