The Female lead has the ability to travel back through time. Each have their own unique way of choosing their exact destination.

Both have strong female characters. In both dramas the female lead are also mothers who endure a lot and fight for the sake of their child.

The grandmother in both are similar: Both on the father's side, bullying of the female lead and favouring the grandson.

In both dramas the female lead is horribly betrayed by the men they love. Both seek revenge and gain people to help along the way.

Both dramas feature multiple human clones. In orhan black clones are female and played by same actress. Tense situations in both.