Morrison had notable gaffs. Hunter hit on both high-picks he's had. Morrison hit on 2 of 3, missing on Schenn, doing well on Rielly and Kadri. I don't think Hunter is a drafting god. I believe he should be capable of beating league average though with his scouting skill, staff and resources. Morrison wasn't doing this. He botched every pick he oversaw in the 20's range as scouting director. Here are his picks in the 20-50 range over his lifespan with the Leafs. Gauthier, Matt Finn, Biggs, Percy, Brad Ross, and Kenny Ryan.
I don't want to diminish Dubas's accomplishments, but as for effect on the NHL team, there really isn't much that can be directly pointed to. Hunter, at least we have something that is quite clear, his draft record over 3 years. Neither are perfect candidates. I personally side with Hunter, as I respect what he has done managing out scouting staff, and completely rebuilding it. He has almost completely turned over the scouting staff he inherited, and I think he is doing a good job at that, luring in highly respected people like Tim Speltz and Ari Vuori.
Its respectable what Dubas has done with the Marlies and SSM. But, Hunter turned around a team that was an also ran prior to him, into the premier franchise of the CHL. Now, he had more resources than most, due to the opening of the JLC, but he was heavily involved in that project.