While You Were Sleeping

Both dramas had one or more character having the abilities of precognitive dreams and for at least one or more of the characters, the dreams manifested into nightmares. Both dramas have the characters who had the precognitive dreams trying to change the outcomes of the nightmares that they had seen in their dreams.

Both are supernatural.
In While You Were Sleeping the female lead sometimes sees people dying in her dreams.
In About Time the female lead sees the life clocks of everyone around her.

Both drama is fantasy romcom and both remind me of each other maybe bcus of the characters, FL is weird in both drama and really hitting on the ML in the hard way LOL also with the ML who look clueless/innocent but actually really courageous..

Both the shows are essentially legal dramas with romance as their core theme.
Also one of the lead characters in each of the show goes on to learn the tropes of working at a legal firm after starting as a clueless rookie in the course of the 16 episodes.

While very different settings, both feature characters who have prophetic dreams of the future and try to stop those events from happening.

They have the same vibe. Both are supernatural and in both the main FL has a rather hard life. Filmed in an artistic way with good music and plot.

Abilities that cause them tragedy.

although both dramas are different genres they both have a female lead who can see future events. in sketch the girl draws the future and in wyws the girl dreams of future events. both dramas involve trying to prevent these events from occurring

One has extraordinary events based on fantasy the other based on quasi-science.
Childhood/youth connection , event triggering mystery/ suspense
Light moments balancing the suspense
Main Character managing life expectancy - pending event
It just feels similar! :)

In this too both leads has the ability to foreseen the future....plus the female lead in this drama also has foreseen her death

-Both are crime dramas
- Bickering couple
- Male leads in while you were sleeping are a prosecutor and a police.
- The overall feeling is quite similar, even though While you were sleeping is a fantasy/crime drama.
- Main leads try to catch a killer together
- COMEDYY

Protagonists both know what will occur in the future. I experienced the same mystery thrill!!! I loved the adrenaline I derived from both.

It's like the remake of the drama from 2011

Similarites
-they are sa same drama
-they are both made in korea
-they have kinda the same story

Pinocchio has the same writer and it has fantasy-like story. The writer casted Lee Jong Suk as well as her main lead. The writer tends to write refreshing fantasy stories. If you want to see more of her works, definitely check out Pinocchio.

Both have some supernatural twists that deals with "dreams" (or technically, parallel timelines for W2L). Both encountered mysteries that they can solve because they have witnessed/experienced it.