The vibe of both dramas is very very similar, you get the same feel as you watch them, plus they both have that mystery vibe to them that makes you want to keep watching, and sad events that are also similar. They just complement each other if you want to feel the same as you did in one of them.

someone is presented as dead as the beggining and we go back in time to see it unfold, the rich and the poor, rivaliry, famly issues