I'm with OBG,
My pants already contain a solid knife, tinder, a Hot Spark and Photon.
So maybe I would take the Mora as it is a serviceable fix blade.
The Rambo knife may have some other stuff inside but it is probably as trust worthy as the knife itself. Since I don't need matches; by the way is there a striker included?

As far as can openers; how many cans of beans has anyone found in the wild?
I guess it is our roots to Hansel and Gretel and the thought that we definitely come across a cabin in the wilds.
If I found a can I can definitely open it with either my EDC (ouch) or the trusty Mora. Then I can sharpen the Mora on a rock.