Days Gone Looks Like Horizon Zero Dawn, Minus Dinosaurs

From what I've seen at E3 2017, Days Gone looked a lot like another Sony exclusive from earlier in 2017, Horizon Zero Dawn. The main difference is that, instead of fighting off hordes of robot dinosaurs (which is new, and awesome!), you are fighting off hordes of zombies (which I've done before, a lot).
In an extended demo at E3 2017, I saw the same mission you can watch below, but at night, and in the snow.
It began with main character, Deacon, accepting a mission from an NPC at a home base. Fr