Avoid a one-number comparison
Two systems with similar stated power can have different sources, optics, controls and intended applications. A buyer does not need to reverse-engineer those differences to write a useful inquiry. Start with the material and the required finished mark. Ask the supplier to propose a suitable configuration and demonstrate it on representative parts.
Compare the actual deliverable
A fast sample mark is not the same as a complete production service. Include loading, data preparation, part orientation, inspection and packaging when comparing proposals. For engraving, state whether depth is controlled. For codes, identify the verification requirement. A proposal that omits those steps may appear less expensive without providing the same deliverable.
Use a sample to resolve uncertainty
An application trial can show whether the proposed approach meets the agreed requirements. Record which part and finish were used, and what was inspected. Do not transfer a result from a different alloy or geometry without review. The right equipment question is whether the complete process can consistently produce the required result, not which machine has the largest advertised number.