Synchronous training in Haidian is more difficult than 53 days of training. This is mainly manifested in the following aspects:

1. Flexibility: The topic of Haidian synchronous training is difficult, flexible and comprehensive. However, the 53-day exercise has fewer questions, simpler questions and more comprehensive answer analysis, which is suitable for basic exercises.

2. Applicable crowd: 53-day training is more suitable for students, and Haidian synchronous training is suitable for students with good grades who want to improve their thinking ability.

To sum up, synchronous training in Haidian is more difficult than 53 days of training. Students should choose suitable exercise materials according to their own learning progress and needs.