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Both plots are 'gender benders'. (TROTAR is slightly) and have a lot of comedy.
In TROTAR a girl goes into a world that she wrote, Hua Yuan City is a city where instead of men being in power, women have overall power. Men are not allowed to be officials, they can't own businesses and they can't even join the army. A powerful man from the city near them (Where the rules are different) marries of FL (who realizes she is the evil princess of Hua Yuan City).

In OMG the FL is a powerful General that is looked up to, she acts quite manly whereas the ML is a handsome yet useless, cowardly man who acts femininely.

I get similar vibes from these dramas but the plots are in no way similar.

Two tales of youth gone wild only one with a much deeper sense of self pitying futility which casts its ill-fated hero as a noble soul left without purpose in the rapidly stratifying society of post-war Japan.

While Circle's genre is more of a mystery/ sci-fi drama. My love from another star is a romance/ historical genre. While the genres and story lines are rather different. The two dramas have the alien aspect relation.

both Pop Out Boy! and W have comic characters that come out of the comic and the love story between a real person and a comic character

Pop Out Boy! and Extraordinary You involve comic characters and the "magical" way they become "real"

both had the "4-against-1 romance" while Was It Love is 4 guys 1 girl and Ex-Girlfri1end Club was 4 girls and 1 guy. plus both have Song Ji Hyo

story-wise both drama are really similar to each other with a smart female leads fighting each other with their wits in a high class society settings, also with every member of the family having secrets and also reason for revenge..
if you enjoy one of these drama you will definitely need to check the other one..

Both stories feature:
-palace intrigue
-a FL trying to help her sister
-dreams that may/may not see the future
-hidden identities

There's also a tone with both pieces--serious but not so much so there aren't moments of levity and sweet romance. (Although to be fair, the ML in Q:L&W is more romantic than the ML in LJY.)

Two women are raped and killed by samurai soldiers. Soon they reappear as vengeful ghosts who seduce and brutally murder the passing samurai.

Ryunosuke Tsukue in SWORD OF DOOM finds himself doomed to walk the path of demons in a downward spiral into madness and despair, SHURA is as bleak dark and hopeless a jidaigeki as was ever execrated and sealed from man and beast on celluloid. Unlike Ryunosuke Tsukue, however, who starts on the Great Buddha Mountain Pass and slowly cuts his way into his own private hell, Gengobe in SHURA starts in that private hell and plunges himself deeper in depths of the soul unknown. The movie opens with Gengobe hunted in pitch black by hovering lanterns held by unseen persecutors. He enters a house and finds a scene of carnage and mayhem, the floor strewn with mutilated bodies, limbs, others hanging dead from the ceiling. I told you it only starts there.

Comedian Yang Se Hyung's new variety show that also often challenges the hosts to try new things and go new places.

Similar vibes from FL being stuck in a story. Lovely, fun vibes in both, excellent chemistry between the leads in both of them.

Both about the rebuilding of a hospital/clinic alone, with community members, and within an established area that is used to how things already work and are nervous about change/ownership, as well as personal growth for the main characters and hard learning

Similar teamwork between civilian and detective with strong resemblance toward the building of strong relationships, humor, and creative stories!

The women come to their loved ones with an extra 49 days after death.
In this extra time, they spend time to fulfill their wish or to understand the true meaning of life.