1, Olympiad involves a wider range of knowledge and is more difficult, which requires students not only to master basic knowledge, but also to flexibly use various mathematical theories and methods to solve practical problems; In contrast, the difficulty of the starry scroll is not low, but the depth and breadth are slightly inferior.

2. The topic of Olympic Mathematics is more novel and challenging. Many topics require students to think outside the conventional thinking and find new ways to solve problems. Although the starry sky volume also has some innovative topics, it is not as innovative and challenging as Olympiad.