Both are historical mini dramas with a royal, powerful, and domineering FL and a lesser powerful ML under her control. Both have an identical scene in the first episode where the FL holds the ML's chin as he kneels in front of her.
Both are historical mini dramas with the same actress as the FL, playing a bold, strong, and domineering character. Both MLs are royal and weaker/in a position of less power than the FL.