Both focus on the female lead and the male lead enters as a secondary supportive partner. In many episodes the male actors get to be in the care of their female counterpart or even protected by them and the female shows herself as the cold hearted person in the relationship. Both have a plot to be unfolded over the entire series that involves revenge and second chances but in one time travel is present while the other isn't.
Both having the same male lead actor (Tony Leung) both movies share a similar vibe even though Lust, Cation takes the love entanglement to the next level. One might see that if you watch In the Mood for Love firs, Lust, Cation seems like a continuation overall for the male protagonist. From far and unreachable to ever connected and almost wrongful placed love.
