Portis doesn't always finish above the rim, but he looks like he'll finish inside and off drives better than Looney. That should also buy him a bit more space on his jumper. He can use his mobility against bigger players and his length against smaller players.
Exactly. He can beat smaller backup 4's in the post, or take bigger backup 5's out on the perimeter (fixed). He can switch every PNR and he is more of a sure thing than Looney or Turner IMO.