Both of these dramas revolve around Illicit affairs and love triangles in work enviorenment, thus they have similar vibes. VIP has plot twists while The Interest of Love is more about a woman who self-sabotages and heals through her mistakes.
In both series the FL runs away from the city life and settles in a countryside. Also in both of the shows male leads have a very calming aura, one works in a library and the other has a bookshop.