Same prompt to each. We time them and check whether any cited link actually resolves (a 404 = a fabricated source). Then a DEB ranks them โ told to stay fair, not home-favoring.
Yes, we often use more tokens โ because we reason it through and get it right the first time. A cheap wrong answer costs you far more: you act on bad info, or re-ask and re-check it a dozen times before you catch it. Right-once is the real savings.