Petrichor

Both have Lesbian romance. Both are in the gl genre and adapted from a gl novel. Both are a lot darker then most gl being in the thriller/horror genre.

Both have a same-sex romance, manner of death is a bl, Petrichor is a gl. Both have the same screenwriter. One of the leads in both series is a doctor. Both series are about investigation of death/murder combined with some romance.

If you liked Petrichor for its mix of crime and the slow-burn romance between two strong women, you should watch Heart Code. Both Thai GL dramas show a relationship growing through danger and high-stakes investigations.
Petrichor focuses more on the mystery. Heart Code keeps that energy but puts the romance more in the spotlight. The leads share emotional moments right in the middle of the action and plot twists.
Heart Code is a great follow-up if you enjoyed the suspense and the heartfelt connection. It gives you that same blend of thriller and romance with a slightly stronger focus on the romantic journey.

Both are queer (one is wlw the other is mlm)
DOCTOR x COP
though no similar storyline, both are amazing plots

Both are Thai GL. Both have some action and a woman who protects her love interest. In Petrichor she is a police detective, in Only You she is a bodyguard.

Both have Lesbian romance, they are both in the gl genre. They both have a combination of gl romance and a mystery, investigation of murder/death.

Both are Thai GL. One of the authors that wrote the Petrichor novels also wrote ClaireBell. Both have darker subject matter than usual GL series. They both deal with criminals.

Both are Thai GL series. Both have Englot as the main couple of the series. ,......... ............ .......... ......... .......... ............. ....

Both have Lesbian romance. Both are adapted from a gl novel. Both have a love interest that is a doctor. Both are a gl combined with another genre (Petrichor is thriller Detective gl and reverse with me is sci-fi gl.)

They both have a lesbian romance and are in the gl genre. Both have a combination of romance with darker mystery and thriller elements.

Both are Thai gl that are unique in the sense that they combine GL with thriller Detective and crime action genre.