Duel (2017)

In both, main leads are carrying their past life memories to make correct their present. Both drama shows strong bromance.

Both has two main male leads. Both are thriller, detective, suspended drama. Adrenaline action pack. You won’t fall asleep on this kind of drama.

Seriously both messed up stories about messed up characters and the same medical torture thing and human experimentation elements in the case of both the clones in Duel and in Taemin's arc. Traumatic backstories and more emphasis on the bromance. Final Life feels like a bad dream, very artistic, definitely a must watch.

Both start of with a pretty simple storyline and one-sided characters but as the series progress so does the plot. Though Liar game is more of a mental struggle compared to Duels emotional roller coaster.

- Smart male lead
- Crime
- Mystery
- Shared past
- Plot twists
- Money issues

Both talk about mysterious characters and about......................................................................SPOILER. human cloning.

While the story and theme differs, the have some similarities:
- Thriller Genre with a mystery
- suspenseful storyline
- smart male lead
- building a "team" and working together
- great cast, especially the lead actors

I discovered both dramas at the same time and like them a lot.

They don’t follow the same plot but they both are very unique si-fi mystery plots.
If you enjoyed the tone of one of the two dramas then you’ll probably enjoy the other.

Both dramas start off quite similar; you're thrown in the middle of a mystery. Basically two dark crime/thriller dramas about clones. Both dramas have an anti-hero, who you end up empathizing with.

They have same premise guys can’t remember accuses of a crime. And a cop desperate to solve case will do anything.

The genres are close enough and I strongly believe that duel is a must watch so why don't you give it a try?
(both dramas talk about psychological, medical and family related terms so i believe that they are similar in that sense)
ALSO Yang Se Jong's acting here is so so so so so so good

Both drama deals with a kidnapped daughter and both leads try their best to find their daughter and fight for her life

While Duel is more suspense thriller, and IRY is more crime solving - what stood out for me was the heartbreaking bro-angst of two characters in both dramas. Without spoiling, you'll realise by the end of both dramas, which characters I might be referring to. If you drop either of the dramas too early, you won't find out :(

Both deal with the idea of clones. Both are extremely dark and messed up. I would say Duel is more messed up but the sadness aspect is the same in Circle. Both star leading actors you'll fall in love with.

Both dramas involved 'siblings' with ill-fated relationship, murder, investigation and revenge. Additionally, both our ML have the same character name. Sungjoon with memory loss and Sunghoon who hold the key of the memory.

Both are crime dramas. Both are science-fiction. In Tunnel the main guy is looking for his kid. In Duel the main guy is searching for his missing daughter. However the two have completely different storylines. Tunnel has the time traveling aspect and Duel has the clone aspect.