A steel hull is better than fiberglass for a number of reasons. First, steel is much stronger than fiberglass and will not flex or deform under heavy loads. This makes it ideal for use in commercial and industrial applications where the boat will be subjected to heavy use. Second, steel is much more resistant to impact damage than fiberglass, meaning that it can withstand collisions and other forms of abuse without sustaining serious damage. Finally, steel hulls are easier to repair than fiberglass hulls if they do sustain damage, making them a cheaper option in the long run.