Both are Thai BLs that involve first one and then both of the MLs time traveling into the past and changing events in their lives. At some point in both dramas, one of the MLs is hospitalized and the other ML travels to the past to try to convince him not to meet/become involved with him, in the hopes of saving his life.

Both leads are supernaturally bound together with any pain/injury the FL suffers going to the ML, unknown to her.

Both involve the FL swapping bodies with a completely different woman following an accident, then taking over that woman's richer or more glamorous life while the original woman in the FL's original body is in a coma. The ML then starts falling in love with the FL who he didn't like before.

Both FLs become or are communists and both plots involve police capturing and torturing the members of the party they capture.

Both are historical mini dramas in which the FL is murdered and returns with a new life, wrongfully believing her husband then and now wanted her dead.

Both have MLs who have a crush on their friend who dates a ton of girls in school but never gets serious with any of them.

Both are youth dramas in which the FL is childhood friends and in love with the ML who ends up getting into trouble over and over. Meanwhile another boy moves into her street and begins being kind to her and eventually becomes the endgame.

Both MLs are wealthy CEOs with severe personality issues who are controlling and possessive toward the FL who finds herself swept up in dangerous events regarding his/her family.

Both MLs are royal generals who position is viewed as a threat by the court, despite him having no interest in the throne, and the court tries to prevent him from marrying or having children. TSPL ends happily, OAO tragically.

Both FLs are the unfavored/not permitted daughter of a family who take the place of their sister in an arranged marriage. Both MLs start out cold and suspicious but quickly fall in love.

Both FLs are unfavored princesses who enter into an arranged marriage with a general. Both MLs are distrusting and cold toward the FL at first but then fall deeply in love.

Both MLs are generals who the FL are forced into a marriage with, but the two fall in love. TSPL is purely historical, whereas TLWOTG has transmigration/time travel.