When comparing prices, you must evaluate the asbestos content grade (Grade C, B, A, AA, or AAA), as higher purity significantly increases heat resistance and cost. Key metrics include temperature resistance (typically ranging from 250°C to 550°C), cloth thickness (usually 1.5mm to 5.0mm), and weaving density. Additionally, confirm if the cloth is reinforced with metallic wires (like copper or stainless steel) for higher tensile strength, as this will command a premium price compared to non-reinforced versions.