How would the book Freak the Mighty be different if told from Kevin's perspective instead of Max's?

For starters, we would know nothing of Max's family
background.  From Max we learn of his childhood trauma:  the mysterious death of his
mother and the equally mysterious--at least at first--imprisonment of his father.  In a
practical sense, the language would be elevated because of his almost miraculous
vocabulary talent.  We also are taken in by the simplicity of Max's personality, by his
desire to learn, by his frustration with his own weaknesses.  We can relate to him.  It
is much more difficult to relate to Kevin on such a level--Kevin, who is physically
impaired yet mentally strong.  Lastly, if Kevin is the narrator, we would be left
without an explanation of Max's destiny at the end of the book after Kevin's
demise.