Love old man-young lady couples in both dramas.
FY couple has almost 10 years gap while OMSHOM couple has almost 20 years gap.
Both couples are cute and they are very honest to each other.

Both have friends to lovers theme.
Both ML and FL always bickering in a funny way. But they understand and support each other the most.
There is a 2nd couple in MCB. They are like bad boy fall in love with the nerd girl.

Both FL are popular actresses. Meanwhile both ML are respected/popular in their own fields (medicine for FW and reporting for FMIYM).
In both dramas, their relationship started as fake relationship.
FMIYM is a melo drama while FW is a light romcom

Both lakorns involve romance and fight between dark magic and light magic
6th sense have 5 couples but KS only have 1 main couple with 1 side couple
KS is more action packed

Both dealing with magic/supernatural and past lives
Both have stories about ancient kingdoms
Both involve 'true love' story
DJNM has more romantic scenes. KS has less but those scenes are heart fluttering because the leads have amazing chemistry
KS has better action and the mystery is more elaborate (oc the romance is still so good)

Both dramas have FL with supernatural power and ML as police
Both have leads with good chemistry
Both involve with crime investigation. But MSP has more story on the supernatural part
MSB has more romantic scene but MSP has better plot