Sharing tips on distinguishing PVC leather and PU leather

Wenzhou Longyuan International Co., Ltd. is a company specializing in the research, development, production and sales of synthetic (artificial) leather fabrics. The company’s products are in more than a dozen categories such as clothing, footwear, bags, furniture, and stationery. The company has been deeply involved in the leather industry for more than 20 years, and its products are sold well in more than 30 countries and regions such as South America, the Middle East, and Southeast Asia. It closely follows the international market trend and accurately provides cost-effective products in various markets to help customers win the market.
Does anyone know how to distinguish PVC leather from PU leather?
We can soak it in gasoline: take a small piece of each fabric and soak it in gasoline for half an hour before taking it out for observation.
PVC leather will become hard and brittle, but PU leather will not.