The difference is that there is a unified entrance examination for the entrance examination, which needs to meet the score requirements, and then there are different classes. Adult exams take the traditional weekend or evening classes, while the distance learning process is freely arranged by students on the internet, which requires students to have more autonomy and self-discipline.
Distance undergraduate level needs to take two unified exams. There is not much difference in applying for a degree.
It is best not to compare the two, but to make a choice that suits you according to your own situation.