Hey TRDD,
I think I can answer your question. I have both of the editions you had mentioned and I'm going off of pure memory here but here goes:
1. The Dragon Age: Inquisition steelbook had two spaces for discs due to the releasing on both current gen and past gen. The past gen edition had two discs for the game while the current only had one. So I think you're good there as this was to accommodate for both.
2. The elite controller came with a charging cable that is only unique to this edition. Your Halo 5 Console Edition did not come with an elite controller so therefore did not have this charging cable added.
Hope that answers your question. If you are still unsure, please let me know and I'll see if I can dig up mine and verify for you.
