Activated carbon vs biochar — are they the same?

1) What kind of claim is this?

This is a claim that two materials are effectively identical.

2) What context is assumed or missing?

Details about how each material is made and used are not stated.

3) What has to be true for this to work?

Their structure, performance, and purpose would need to be similar enough to treat them as interchangeable.

4) When would this not hold?

The claim weakens if differences in processing or function change how they behave.

5) What follows if we accept it?

People may treat the two materials as substitutes in buying or regulation.