1. Purchase Limits: Premium Links may be for customers who purchase large quantities of goods or place high-value orders. Through Premium Links, these customers may be able to enjoy higher purchase limits or more flexible purchasing methods.

2. Prices and Discounts: Premium Links may offer special price offers, discounts, or promotions. This is to attract premium customers and build long-term relationships with them.

3. Service and Support: Premium Links may offer a higher level of customer service and support. Premium customers may have a dedicated account manager or support team to handle their orders, solve problems, and provide personalized services.

4. Purchasing Process: Premium Links may simplify the purchasing process and provide more convenient ordering and payment methods. This helps premium customers purchase and manage their orders more efficiently.

It should be noted that the specific differences may vary depending on Amazon's policies and the specific circumstances of premium customers. These differences are designed to provide premium customers with a better shopping experience and more convenience to build a closer relationship. Ordinary links are suitable for general consumers or small-scale purchases.