Both of these shows have a man who is stoic, dangerous and powerful who is seeking revenge in secret for the death of family. They also both control their own loyal guards, They both fall in love with a girl who wants only to live free and is very smart and crafty, making moves on her own to help herself and her friends. The LLTG mom and the Unchained Love empress are played by the same actress. One of them is clearly more evil than the other.

Both have a smart female lead who schemes to make her life better. There’s a little crime solving in both. The FLs have multiple suitors and they have significant relationships with the SMLs, not just one sided pining. They have a similar flavor

Both are stories of a child returning to take revenge on their father by taking over the company. They were both separated from their dad at an early age and raised with a step dad who was wealthy and loved them.

Both dramas have a male relative helping their pregnant female relative marry the man they love by forcing another woman to marry him. In this case the uncle marries a woman who is pretending to be pregnant to protect her adopted brother from being forced into marriage with the niece.