Both dramas begin with the FL dying, then finding herself alive and back in the past, using her knowledge of what will happen to change her fate.
Both are mini dramas centered around a revenge plot by the FL(s). Both FLs have knowledge of what will happen (through premonitions vs. time travel) and use it to their advantage. The MLs start out as sidekicks/assistants to the FL's revenge plot but have secrets of their own, and over time the two fall in love. Both dramas have a very similar feel and pacing.