It basically has the same concept, but in a historical setting. Both dramas have a strong female character who is caught between the good, romantic boy with a sad romantic backstory, and the stubborn, dark bad boy. There are supporting characters very similar to the ones in this show, as well as a mean girl/rival of the main character who has eyes for the bad boy. Both main characters find themselves in a new lifestyle and find themselves being surrounded by royalty (the rich people in Boys Over Flowers, the princes in Scarlet Heart: Ryeo). While one might find the two dramas very different from a distance, they are actually quite similar when you look closer.