When comparing prices, you must ensure the technical parameters are identical. Key factors include the Rated Current (In), Rated Voltage (Ue), and most importantly, the Rated Short-Circuit Breaking Capacity (Icn/Icu). A breaker with a 10kA breaking capacity will naturally command a higher price than a 4.5kA or 6kA model due to the superior materials required for arc quenching. Additionally, verify the Tripping Curve (B, C, or D) to ensure it matches your specific application, whether it be resistive loads or high-inductive motor starts.