The difference between electronic port u-shield and IC card is different storage methods, different usage ranges, different security, and different application scenarios. The details are as follows:

1. Different storage methods: Electronic port U-shield is a secure medium based on USB interface, while IC card is a secure medium based on chip.

2. Different scope of use: Electronic port U-shield is mainly used for identity authentication, encryption and decryption and other security operations in e-government, e-commerce and other fields, while IC cards are widely used in finance, transportation, social security, etc. field.

3. Different security: Although both electronic port U-shield and IC card have security functions such as digital signature, encryption and decryption, U-shield is more secure because of its more advanced storage method.

4. Different application scenarios: Electronic port U-shield is mainly used in the internal networks of governments, enterprises and other institutions, while IC cards are mainly used in public places, personal use and other scenarios.