Direct search maximises speed. A buyer guide adds checkpoints for options, fees, restrictions and parcel decisions.
Best when speed, breadth or initial discovery is the main need. Use it to create a shortlist, then verify every decision-relevant detail on the current source.
Best when context, current transaction detail or received-item evidence matters. It narrows uncertainty but still has limits.
Use both surfaces in sequence: discover broadly, verify the live source, confirm the submitted option, inspect warehouse evidence, then compare the final parcel quote and terms.