Both are short length dramas with 100+ episodes and a similar tone/feel. Both have a Republican Era setting, a sometimes violent love/hate relationship between the leads, a scheming SFL, and a hovering SML.

Both are mini dramas in which the FL has a hard life and the ML is rich, has a cold personality, and is in a wheelchair.

Both are soap opera like mini dramas in which the ML is in a wheelchair and there's a scheming SFL who is trying to destroy the FL and take the ML for herself.

Both are mini dramas in which the ML is injured and the FL is forced to break up with him, not telling him why and breaking his heart. A few years later they accidentally cross paths again and the ML discovers that the FL was pregnant when they broke up and he has now has a young child.

In both, the main couple breaks up and the ML has anger toward the FL due to lies and misunderstandings. Five years later, the two cross paths again, and the ML discovers he has a child he didn't know existed. Both kids are ill and need treatment.

Both are about a couple breaking up, with the ML holding anger toward the FL, believing she betrayed him. A few years later they accidentally meet again, and the ML discovers she has a young child and a man by her side who he initially assumes is the child's father. However, he soon learns he's the child's father.

Both are mini dramas in which the couple breaks up and reunites accidentally a few years later, leading the ML to discover he has a child/children he didn't know existed.

Both are mini dramas in which a couple breaks up and meets again a few years later at which point the ML discovers he has a young child he didn't know existed.

In both, a couple breaks up and the FL secretly gives birth to their son alone. Five years later the couple crosses paths again and the child's starts bringing them closer together again.

Both are mini dramas in which a couple separates due to lies/misunderstandings and reunite accidentally a few years later, with one learning they have a young son they didn't know existed.

Both are about a couple becoming close through the influence of their adorable young son.
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Both are about the main female character having a supernatural ability to "hear" people's secrets (lies vs. inner thoughts). Both have a colorful cast of characters and a mix of drama and humor.