For commercial high-traffic areas, prioritize Porcelain tiles with a PEI (Porcelain Enamel Institute) rating of 4 or 5, which indicates high resistance to abrasion. For residential use, a PEI rating of 3 is usually sufficient. Additionally, ensure the Water Absorption Rate is less than 0.5% for porcelain to guarantee frost resistance and durability. Always verify the COF (Coefficient of Friction); a value of ≥0.60 (wet) is the standard for slip resistance in public commercial spaces to meet safety compliance.