1. Different geographical location: Changsha University of National Defense Technology is located in Changsha, Hunan Province, where its headquarters is located. Hefei University of National Defense Technology is located in Hefei, Anhui Province, and is a branch of National Defense Technology University.

2. There are differences in disciplines and specialties: Changsha University of National Defense Technology, as the headquarters, has a complete discipline system covering the main fields of national defense science and technology. Hefei University of Defense Technology, as a campus, may focus on specific disciplines or majors to meet local education and scientific research needs.