There are differences and similarities. Similarly, the undergraduate degrees obtained after graduation are all recognized, and there is no difference. The difference is:

age limit

Correspondence undergraduate course has a limited number of years, such as graduation in three years. Adult college entrance examination has no age limit. When can I finish all my studies and pass the exam, and when can I graduate and get my degree?

Teaching and examination

Correspondence is generally several kinds of teaching and exams. Adult college entrance examination is mainly self-study, and exams are one at a time.