As I have both games I did a size comparison of the miniatures figures in order to see if I can use Last Night on Earth heroes as Zombicide additional survivors. I did the same thing with the zombies trying to see those that I can use as Walkers, Runners and Fatties.
On the photos, the Last Night on Eart Zombies are those in colored plastic while the Zombicide ones are in grey plastic.
Nota : The two fatties are from LNoE expansion, Zombies with grave weapons.