The company compares the ratios of surface area to volume for two more containers. One is a rectangular prism with a square base. The other is a rectangular prism with a rectanguial base. One side of the base is equal to the side-length of the first container, and the other side is twice as long. The surface area of this second container is 4x^2 + 6xh. The heights of the two containers are equal. Which has the smaller surface area-to-volume ratio?