1. Products sold: The types of products sold by duty-free shops and counters are basically the same, but there are some differences. For example, duty-free shops will have more product choices, while counters will focus more on one or several types of products.

2. Price: The prices on duty-free shops and counters will be different. Duty-free shops will have a certain discount, and the price on the counter is closer to the retail price. However, the specific price changes will be affected by many factors, such as seasonal sales and promotional activities.

3. Service: There will be differences between duty-free shops and counters. For example, duty-free shops will have more employees to provide services, while counters will pay more attention to personalized services. In addition, the service of duty-free shops is restricted by customs and other laws and regulations, so there will be more time restrictions.