also take into account, MotD has cell block for grief matches. Buried has borough for grief and turned however imo its the worst map for both of those modes. Origins doesnt have either of those modes.
another thing i dont anyone has commented on is that buried has four different buildables. mob and origins technically have 2, but its just a shield and some secondary thing depending on map.
lastly, if youve got friends that you commonly play zombies with, origins would be a good choice. although it may take some getting used to, you can always change it up "lets trade staffs each wave" "lets camp on the tank till we die". i feel the same can be said for Mob just on a smaller scale. Sure you can do that on buried but unless you agree not to use the buildables its really boring.