Vengeance of the Bride (2022)

Leads who haven't seen each other since childhood reunite in adulthood, and initially believe each other to be half siblings. Female lead turns out to be unrelated (biologically) to the main family.

-Both dramas have dark elements of Makjang like murder, birth secrets, hatred, greed
-Both female lead are badass
-Both female leads are adopted
-Both female leads are being abused by their adopted mother after discovered that the female lead is not her biological daughter
-Both second female lead is envious towards the female lead
-Both second female lead are annoying and selfish
-Both second female lead has hatred towards the female lead
-Both dramas shown the younger years of the characters
-Both female lead have tragic incidents
-Both female lead have different names
-Both female lead are adopted by the enemy of her parents
-The both of adoptive fathers was the one who murdered the parents of the female lead

There are so many similarities!
To start with
The dead twin-sister replacement.
A very protective 'older brother'.
Fake siblings.
Leads working at the family company.
And more...

Similar makjang style with 100 episodes, filled with secrets and murder.
A tragedy occurs for three women, caused by greed and desire.

Yoo Soo Yeon grew up with ordinary parents. She falls in love with a man from a chaebol family and marries him. Her life seems to mirror that of Cinderella and she is envied by others, but her life isn't easy due to mistreatment from her in-laws.

Cha Hwa Young is full of greed and desire. She tries to keep her upper class life.

Go Mi Sook is a private moneylender and she owns a franchise restaurant chain. She is a good person.

The female lead in Vengeance of the Bride is also in Young Lady and Gentleman. If you like her acting in either one, I suggest watching the other.

In both dramas, the female lead gets married as she sees that as the only way to get back at those who hurt her.
In both dramas, feelings of love and romance begins after marriage.
The only difference is that in vengeance of the bride, the female lead married into the family she wanted to take revenge on but with perfect marriage revenge, the female leads gets married into a powerful family as revenge against those who raised her but never made her feel loved.

They're very similar with the whole revenge theme if you like that I think this would also be great for you.

It has the whole revenge theme here. I think it also started off with like parents and the kids I think you'll really love it check it out.

This one also has a revenge theme. It involves the parents including their kids and then there's the hidden identities and babies being swapped and just much more. I think you'll really love it you should check this out too.

Both have a similar plot (hidden identity, marriage with hidden motive, betrayal, etc)
Same actors playing the female antagonist & FL’s mother role

Similar plot (Parents mess up things which affects the next generation, revenge, etc)
Park Ha Na plays the lead role in both of them