Betrayal or Loyalty, Which is Better?

In a world of heroes and villains, where the son or daughter of each hero and villain go to school to reach their goals in life. When each child turns sixteen and graduate from highschool, the must go to a special ceremony, there they close whether they want to stay the same or betray their families by switching sides. No one had ever changed.... well not until Emerson and her sister came along. Both knew the never belonged in with the villains, but when a group of villains also switch it brings questions. Who's loyal to their families, and who's betraying theirs.... Which is better?