We started looking at one with 2 full size bunks for the kids, and it had a seperate outside door to the bathroom. We ended up with 4 smaller bunks.
What changed our mind was The amount of outside storage on the 4 bunk one, and having a door for the bunk room. When I started packing the trailer in my head, and thinking where to load chairs, grill, stove etc, we felt the 2 bunk one didn't have enough outside storage. We were upgrading from a popup, and we did not want to have to load outdoor items inside the camper.
We are really happy with the choice.