They are two completely different things.
Toxin binder is actually binding the toxins after they are produced, similar to putting a plaster on a wound.
Mold inhibitor prevents the toxins from forming. It prevents the molds from becoming active and prevents them from producing micro toxins.
One important fact shown by research is that there can be high challenge of micro toxins, even if you don't have a clearly moldy raw material. This is because micro toxins exist in the field.