A double degree is a supplement to this degree, or to one's own ability. For example, taking several pairs of children's shoes in engineering, both of which are classic, is to consider that a person needs such ability in his future work. Those who take a double degree can get a second degree certificate as long as they have completed the required credits, which is very convincing when looking for a job.

As for the minor, it is lower than the requirement of double degree, and the credit is only about half. Of course, if you don't want to take a double degree, you can change your minor. Of course, a minor is not as convincing as a double degree.