Both have a similar plot of the FL marrying the prince who then becomes the emperor. Both FLs become trapped between the two royal brothers as well as the emperor's evil concubines. Both FLs lose at least one child due to the emperor, and are believed to have lost their fertility as well (in the movie BCTSAL the FL learns she is pregnant again). A lot of both dramas are set within a palace and the FL undergoes a lot of hardship and emotional growth.

One is the drama, the other the finale movie which gives it a proper ending.
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Both are fantasy/historical dramas with a older master ML and a younger disciple FL. Both MLs are cursed/harmed in some way (a cold curse vs. a wolf curse), and both FLs start out very innocent and then experience a lot of grief and loss.

Both are historical/fantasy dramas in which the ML is poisoned/cursed resulting in an animal-like personality to emerge.

Both dramas involve characters under a "wolf" curse that takes over their personality. Both also have a star-crossed romance between the leads.

Both are mini dramas that begin with the ML "purchasing" the FL. Both MLs are rough, FLs seemingly innocent.

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Both are set within a dream world of the FL who is trying to wake from a coma, with the ML both in the real world and a coma as well.

Both are mini dramas with a contract marriage between the main couple that becomes true love.
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Both are mini dramas with a contract marriage between the main couple that becomes true love.
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Both are mini dramas with a contract marriage between the main couple that becomes true love.
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Both are dramas with a contract marriage between the main couple that becomes true love.
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