Hawkins is a little better defender and a lot better passer, but WAY, WAY worse as a scorer than MPJ ever was. It's not really close. MPJ was the presumed top pick, and for good reason, for a couple years before he blew his back out and slipped in the draft.
MPJ's biggest downside is he never, ever passes the rock - Hawkins is a really good passer for his size. MPJ's biggest upside is he's a lights out shooter and can use his elite athleticism to get easy buckets - Hawkins is just miles behind in those areas. MPJ is more 3 than 4, and Hawkins definitely can't play the 3 much.
Very very different players.