Sorry, I misunderstood. If you're building a service door, I would think the same thoughts would apply about material. I would focus more on the hardware (Strike plate, door knob, etc.) There is no substitue for strong hardware and LONG screws to attach the strike plate to the facing. The idea is for the screws to pass through the jamb and into the studs. This will make it harder to kick the door in. Most often a swift kick will just rip the strike plate and jamb material right out of the wall. Obviously, the door needs to be strong but most crooks are going to attack the door near the knob/lock.
Hope this helps,