BigQuery on-demand pricing charges for data processed by each query. BigQuery Editions use capacity-based pricing for compute, with commitments and autoscaling options that change the cost model.
On-demand cost depends on bytes processed and query frequency. Editions cost depends on the capacity model, slot usage, edition, region, and commitment. A query that scans the same data can therefore have different economics under the two models.
Compare representative workloads using bytes processed, slot consumption, runtime, concurrency, and storage. Include reservations or commitments when measuring Editions, and include query volume when measuring on-demand usage. Google documents BigQuery pricing.