Neither one looked to be of very good quality that might last more than a year or two out in the weather. The other one only looks bigger because of the height. I dont think it was much bigger in terms of footprint.
If prefab you must, and you can either safely free range or free range with...
I went and checked them in person when I was first getting into chickens.
They are tiny. Doll house sized.
The hardware for the door closures on the display were already pulling out of the wood.