Adult education is adult education, but the school you rely on is different, but the gold content of the certificate is the same all over the country.
Adult education is now mainly a way for students with low scores in college entrance examination to enter universities and obtain undergraduate diplomas.
For students with low grades, I think they should be taught as adults, at least as undergraduates in the future. Your platform will be high and your potential will be stimulated.
If you study the second major, it will be a tragedy, and you will be unemployed when you come out.
Adult graduates also enjoy the same treatment as undergraduate students.
But if you have the strength, it is better to study for the self-taught undergraduate course.