When comparing prices, you must look beyond the unit cost and evaluate Alumina (Al2O3) content, Bulk Density, and Cold Crushing Strength (CCS). For instance, high-alumina bricks (75%+) command a premium due to their superior thermal stability and resistance to chemical erosion. Additionally, the Refractoriness under Load (RUL) is a critical metric; bricks that can withstand temperatures above 1580°C without deformation will naturally have a higher price point but offer a longer service life in industrial kilns.