While both should realistically bring similar value, I see much more upside in Sennecke. Every single tool he has favors him, the only thing that I prefer for MBN is that he's a wrecking ball and probably the best puck hound in the draft.
Ultimately, I don't want to pick Sennecke at 5, I don't see him as an equal to any of Demidov, Lindstrom, Iggy or Catton.
The 10-15 range is fantastic also and I'd love to be able to trade back but no one really has the horses to tango. The only picks available would be Flames 9 and 29, if they really want to snag Iginla but I'm not sure it's worth it. I'd probably do it if they added #41 though. 9-29-41 for 5 ?
Pick the faller of Demidov, Catton, Iginla, Buium, Sennecke, Levshunov, Lindstrom, Dickinson, Helenius, Silayev, Parekh and then try to move up again with 29-41-58 in the top 15 to grab the other one. If there's no D left at #14, Im sure Sharks would entertain that. Maybe even send one of Harris, Struble or Barron their way.
9 and 15 instead of 5. I'm a mastermind.
Iginla shot up the rankings in a 10 months span.
Sennecke shot up the ranking in a ten game span.
Very different development.