Michel compared to Alto, at least in the beginning of the show I think was implicitly stated to be a higher graded pilot. IIRC in the deculture edition, when Luca was complaining about how simple the program was to be in the concert and Alto was pouting. Michel made a statement to Alto along the lines of "If you don't like it, then win the leader position" and then chided Alto for constantly finishing 2nd place.
So at least in formal grading it's implicitly stated that Michel is tops in their class.