The same atmosphere
Dark
Characters with monstrous strength
Violence and gore but it's more extreme in Bulgasal than L.U.C.A

Fake adopted daughter,missing biological daughter,fake daughter who want love from her mother.. lots of similarities.

Both drama has a possessive and abusive male lead.
(Mo Shaoqian) from SWAK Is a little kind towered the female lead and (Kawee) from SB is just very very cruel another thing is that the female lead in SB Is stronger than the other from SWAK Who`s naive and weak.

Both share the Same atmosphere and the same Female Lead (Yoon Jung Hee) her personality in Dear Heaven Is More stronger and less of a very quite type female lead both share a realistically built relationships and also in both drama the main 2 couples rarely quarrel with each other but in (Dear Heaven) the two main couple are so much better in term of mutual understanding.