BOPET and PET are both made from PET resin, but BOPET has been stretched in two directions, or biaxially oriented, to improve its strength and physical properties. This makes BOPET stronger, more transparent, and more resistant to moisture, chemicals, and UV radiation compared to PET. In some cases, BOPET may be a better choice than PET due to these improved properties. However, in other cases, PET may be more suitable due to its lower cost or other factors. Ultimately, the decision of which material to use will depend on the specific requirements of the application.