Martone is a winger that has size and skill but lacks the dynamic offensive abilities for a true number one.
Misa, great skater and can score but somewhat lacking in the hockey sense department and it's unlikely he will be a true center in the NHL. So, think of a potential high scoring winger that will need support. As a result, not a true 1OA pick.
Hagens, exceptional skating ability coupled with a high-level CPU (mucho hockey sense) that is able to drive a line. He can score as well as set up. Projects as a center in the next level. A legitimate 1OA pick.
Schaefer, outer worldly skating ability coupled with tremendous skill. Defensively responsible enough to be on a PK at the NHL level while being the man on the PP. Projected as a true number one Dman and a worthy 1OA pick
So, it's really between Hagens and Schaefer and most of us will have a pretty good indication by the February as to who will and deserves to go 1st overall.