Also in the super-heavy division there's no weight cap.
If there's a weight cap then body comp is more a concern because you want to be as close to the cap as you can and you want as much muscle as you can get, so if you are maxing out the weight due to too much fat, that's bad.
But in the top division, there's no cap. It doesn't matter how much you weigh. So there's less body comp there as well.