The main difference between OEM and ODM lies in the fact that the former is a product design program put forward by the commissioning party - regardless of who completes the overall design - and the commissioned party is not allowed to provide third-party products using the design; while the latter from design to production are completed by the producer. The latter, on the other hand, is designed and manufactured by the producer, who buys the product after it has been molded by the licensee. Whether or not the manufacturer can produce the same product for a third party depends on whether or not the licensee buys out the design.
For example: A puts forward the functional requirements and design scheme of a product, and looks for B to "OEM" the product, and sells it under A's reputation, so B is the "OEM supplier"; A looks for B's product, and wants to sell it under A's reputation, so B is the "OEM supplier"; A looks for B's product, and wants to sell it under A's reputation, so B is the "OEM supplier"; A wants to sell it under A's reputation. The company's products are sold in the name of A, so it looks for B to carry out "OEM", then B is the "ODM supplier".
To put it bluntly, the difference between OEM and ODM lies in the core of the product is who enjoys the intellectual property rights, if the commissioning party enjoys the intellectual property rights of the product, that is, OEM, which is commonly known as "OEM"; and if the producer of the overall design, that is, ODM, commonly known as "OEM", the producer of the overall design, that is, ODM. "labeling".