Both are historical mini dramas with the same actor and actress as the leads.
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Both are historical mini dramas with the same actress as the FL and the same actor in a main role.
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Both are historical mini dramas with the same actress as the FL and the same actor in a main role.
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Both are mini dramas with the same actress as the FL and the same actor in a main role.
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Both are historical dramas with the same actress as the FL and the same actor in a main role.
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Both are mini dramas with the same ML and FL as the main couple.
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Both are mini dramas with the same ML and FL as the main couple.
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Both are mini dramas with the same ML and FL as the main couple.
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Both are mini dramas that start with a one night stand between the leads, followed by a contract marriage that becomes true love. One of the leads (FL vs. ML) is a cold CEO, the other a warmer personality.

Both are historical dramas and have a similar setting in the grasslands, and both FLs are out for revenge after losing their family.

Both movies are about demon MLs who have a contract of some sort with the human FL who is much stronger than she first appears.