Just cleaning the vaulted ceilings and all the high windows is a big difference that can be seen in the pictures. Multiple large windows are also a contraindication for it being a storm shelter.
Perhaps the frequency of storms. For example, Europe doesn't have many storms of the same intensity as the tornadoes of the Midwest or the hurricanes of the South.
China's imperative is to build cheap and even disposable buildings. The difference in storm shelter paradigms and design considerations is a tangent at best considering we don't share the same concerns here or whatever alternative buildings you are insinuating.