When comparing prices, you must look beyond the surface. Key technical drivers include the flow rate (standard 40-50L/min vs. high-flow 70-80L/min), the number of nozzles (single, dual, or multi-product dispensers), and the accuracy error margin (typically ±0.25% or better). High-end models feature explosion-proof motors, advanced flow meters with electronic calibration, and durable solenoid valves. A lower price often indicates a mechanical meter rather than a high-precision electronic one, which can lead to long-term fuel loss.