I'mma just say it, Deku would've been stronger had he trained with Endeavor after the Sport festival arc. I get it, Torino is a badass with the damn air propel feet thing and the kicks are badass, but it doesn't change the fact that he's a TERRIBLE teacher. Look at the growth between Izuku with Torino and how he needed days to figure to properly circulate OFA throughout his body.
Whereas Endeavor's lessons are short, straight to the point and easy for Izuku to follow since it was shown that Endeavor can ACTUALLY understand what Izuku's muttering about and it allows Endeavor to change his ways of teaching to fit Izuku's learning way. By listening to Izuku's constant muttering, Endeavor learns that Izuku thinks a LOT when it comes to training