Recommendations

They both have the same comedy vibe both hilarious
both have fighting
both have friendship and romance
both side characters are funny
if you like one you should love the other

A child enters a very dark gangster world in a very young age. In both dramas they do horrifying things for a parent-like person. Some day they get confronted with the normal world and kindness - they start to struggle who they want to be.
Both dramas are pretty dark. The gangsters also have some persons they care for,

The production team, especially the Director, Darryl Yap, known for his controversial masterpiece, made a tremendous course of the Filipino film, breaking the cliches plot circulating all over social media Filipino Television. 'Tililing' and 'When I Grow Up, I Want to Be a Pornstar' are his new controversial masterpieces that some well-known celebrities have criticized, especially Liza Soberano, who made a spark of debate all over the social media platform because of the poster, Tililing. On the other hand, 'When I Grow Up, I Want to Be a Pornstar' also created a head-turner film whose actresses were once fantasized by some Filipino males. Both are highly recommended!

So I'm thinking about Memory Lost Seasons 1-3 (2016) as I watch Storm Eye. I'm on episode 13 of Storm Eye, I was expecting a lot more action and a slow burn romance. So far it's a slow burn all around.
Memory Lost had a lot of action and a lot of romance.
They both are investigating cases, that lead to one large conspiracy.

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.

—too many misunderstandings
—FL of TBWY is a SL in RTTDS
—not a very clear ending, more like open

loveyou.
Everything is very touching
I wish you lasting progress and success I wish you all happiness

Both dramas have Two friends who fought gangsters and police corruption
they tried to protect and save each other from the cases they are involved in
The korean drama has more fight scenes and side romantic story
not sure about the chinese one yet

Both Bromance dramas
Both new amazing friendship dramas
they both have two male leads who are friends and helping each other , protecting each other
have different background and painful life

Rental deals with alive people and their problems, experiences, and emotions.
Meanwhile, Dele explores people which already passed away.
Both series are episodic and have well-developed characters.

Both dramas involve retaired professional athletes and promote physical activities for non-professionals.
If you wish for nice motivational dramas to start doing sports these two are a must.

Both shows have the same main cast and were made by the same screenwriter-director duo (Fatball and 25) making them look almost like spin-offs or remakes

While the plot for both shows isn't that similar, they use the same way of storytelling where each major event is shown from different POVs that complement each other

Similar vibe and plot - a group of lonely people bonds together after they get involved with each other because of money-related crime

Psychological thriller
Possibility of Main lead being the killer
Doesn't hold back in terms of gore
Dark theme/colors
Main lead is a cop/detective
Killer has a particular M.O.