The Imperial Coroner (2021)

Both FLs are poor, solve cases and are medically trained in some way, MLs are wealthy and connected to the palace. Both FLs are adorable and MLs initially cold.

In both of these series, the female leads are rational and are good at what they do. Jun Jiu Ling is smart and schemes with life as a whole while the imperial coroner does her job well and has a good head on her shoulders for deducting cases but can be a little naïve when not on guard. They portray strong characters to strangers and the outside world but have allow themselves to be comforted by their counterparts when they are having a breakdown.

The male leads in both series express their feelings pretty early on. They both have their own three musketeer group and really trust those around them. I like that both couples work hand-in-hand and serve as each other's support.

Both are great underrated historical dramas that definitely shouldn't be overlooked.

Both FLs are talented coroners and MLs are initially disguised princes who work together to solve a case.

A very similar setup with a case lasting years to solve until the mains work on it.

With some difference being the length of the case in question.

The leads seem to have similar motivations

Both are really well made and highly enjoyable dramas about Coroners/Forensic Medicine in Ancient China and Crime Investigation. Both have capable and smart characters who don't mess around, and the plot is carefully designed and fast-paced, not a single second is wasted. I wish there were more dramas like this.
About Judge of Song Dynasty, don't hesitate because it's an old drama. Only the camerawork/color palette is dated (actually better and consistent than some dramas these days) but everything else is really good and holds well against time.

Young girl Chu Chu came from a family of coroners. She meets Prince Xiao Jin Yu, a dignified prince in charge of criminal lawsuit who appeared weak and sickly. Prince Xiao lacks reliable manpower to investigate case, while Chu Chu lacks people to step up, take charge and be a man.
Together, they manage to unravel a shocking case that has dragged on for 18 years. After solving the case, she won the Emperor's approval and is finally certified as the Imperial Coroner, fulfilling her life goal.

High-quality period detective drama with a similarly small, focused cast, tight plot, and case-solving structure.

Want to watch a real storyline then this is a way better pick.
Even the cover is similar to the Imperial Coroner poster

Detective genre in ancient historical setting
Set in Tang Dynasty Chang An
FL Chu Chu came from a family of coroners.
She pairs up with a ML to solve crime

Both involve a smart FL who has an ability to solve mysteries by using her skill and mind. Both have enemies around them that they can't see just yet and both have to deal with a scandal and conspiracy that with both FL and ML plus friends help solve who's th real antagonist at the end.

Although Go East is more comedic, both sramas are about two sets of couples solving cases, with one couple doing all the fighting and the other couple doing all the thinking.

Both FL is a coroner in ancient China. Intelligent in uncovering cause of death. Both FL become instrumental in helping ML solve cases. Both ML have a magistrate type of post. Both ML are intelliegent, well respected and feared by many

Just like Mei Ren Mou Lu, The Imperial Coroner is a mystery drama set in Tang Dynasty with a little romance as well.