The Goddess of Revenge (2020)

Both dramas involve women coming together for revenge, with strong female characters and smart male lead.......

Though story is quite different it gives similar vibe.
Strong FL against a rich and powerful opponent.
Both the Fls loved the kids dearly and wanted to protect them.

Both drama is about revenge. I personally recommend this drama bcoz this drama has a unique plot. This drama is very funny.

Both dramas revolves around a group of people taking revenge for others

Both dramas ML has lost a family member

Both dramas has Action,Thriller keeps us juiced to watch what happens next

Both dramas have a similar plot basis/structure:
A man faced with injustice, seeking revenge on those who hurt himself and his family, utilises a woman (who also experienced tragedy/injustice and is seeking revenge) as the central figure in his ploys to achieve revenge.

Both dramas feature plots intricately designed to systematically bring down the enemy and ultimately get revenge for injustices suffered.

Both male leads work within the justice system Jang Do Han [The Guardians] is a prosecutor and Cha Min Joon [The Goddess of Revenge] is a lawyer.