The City University of Hong Kong and the University of Hong Kong had to consider many factors such as the school's reputation, teaching quality, subject ranking, research level, employment prospects, and so on. Below are some differences between them: 1. Reputation: City University of Hong Kong and University of Hong Kong are both the best higher education institutions in Hong Kong. Both universities are ranked among the top in the world university rankings. Therefore, from the perspective of the school's reputation, City University of Hong Kong might be better. 2. Teaching quality: Teaching quality is another factor to consider when choosing a university. Both universities provide high-quality education and training, but the difficulty and depth of the courses may differ. In addition, the teaching resources and facilities would also be different. 3. Ranking of subjects: In the world university rankings, City University of Hong Kong ranked 14th in the world for computer science and University of Hong Kong ranked 17th in the world for computer science. This showed that both universities had a high academic reputation in the field of computer science. 4. Research level: Both City University of Hong Kong and University of Hong Kong have rich research resources and have made remarkable achievements in many fields. Both universities had many well-known research teams and mentors. 5. Job prospects: Job prospects are another factor to consider when choosing a university. According to the employment report of the University of Hong Kong, computer science graduates had a high employment rate and good job prospects after graduation. The City University of Hong Kong and the University of Hong Kong had a good reputation and excellent teaching quality. Which one was better depended on the individual's needs and preferences.