Josh stats his first year were terrible but you saw glimpses of what he could be. Maye has better stats but there is nothing to suggest he will be a star. His ceiling looks more like Kirk Cousins to me.
Also remember Josh's jump was in year 3 and was unprecedented. His degree of improvement is very very special and unlikely to be repeated.
That said, New England has about as bad as skill position situational as Buffalo did in 2017 and 2018. If they add a true #1 Maye could blossom.