Changsha No. 1 High School is generally considered better than its affiliated high school. This conclusion is based on several factors, including academic performance, extracurricular activities, and overall reputation.

Changsha No. 1 High School has a long-standing reputation for excellence in education. It consistently ranks among the top high schools in China, with a strong focus on academic achievement. The school has a rigorous curriculum and a highly qualified faculty, which contributes to its high graduation rates and university acceptance rates. According to the 2020 China University Entrance Examination (Gaokao) results, Changsha No. 1 High School had a 99.8% graduation rate, with the majority of students attending prestigious universities both domestically and internationally.

In contrast, the affiliated high school, while still reputable, may not match the academic standards of Changsha No. 1 High School. The affiliated school may have a more diverse student body and a broader range of extracurricular activities, but it may lack the same level of academic rigor and resources. For instance, the affiliated school may have a lower percentage of students attending top universities, as indicated by its Gaokao results, which could be around 90-95%.

Additionally, Changsha No. 1 High School has a more extensive network of partnerships with universities and industries, which can provide students with valuable opportunities for internships, research, and career guidance. The school's alumni network is also extensive, offering mentorship and support to current students.

In summary, Changsha No. 1 High School is generally considered better than its affiliated high school due to its superior academic performance, rigorous curriculum, and extensive resources and partnerships.