You sound totally objective. Let me think about it.
I hope you are being serious as its an interesting topic. That video you showed was a young Murray who has definitely lost some speed since then.
However, in my opinion, Zeke is a much better blocker than Murray or perhaps any other RB in the league. This is more important than catching in my book, and almost as important as running. As for catching, Zeke and Murray look indistinguishable to me.
As for running Murray was naturally more patient than Zeke, but that gap is closing every week it seems. Zeke makes straight line yards through seams better than Murray, as he is lower to the ground, quicker and constantly falling forward. Murray had better cutting ability vision than Zeke early on, as Zeke just heads North like a bullet.
Murray preferred a stiff arm. Zeke prefers a hurdle. Again, a hurdle is a north/south attribute.
I think Murray and Morris are comparable talents. I think Zeke would start in front of Murray no doubt.
Thats my comparison so far.