Recommendations

The main idea that these two have in common is that the ml are yakuza or in Gokushufudo former yakuza.
Besides that I would say G is a lot. more comedic and good comfort show.

Yes, both have mature and step-by-step love but also there's being in a relationship/dating fear, anxiety, actings are well-done

in both Can I Buy Your Love From a Vending Machine and Restart After Come Back Home, we see mature love with slow and realistic way, we can see characters' love searching and fear. They've really good acting and everything, emotions make you feel like 'well-done'

Have the same plot where one person waits for years.
Also the person that dies changes gender when they reincarnate.

Waiting and searching for one you love over time is one thing both series have in common. Like UWMA, there was the nostalgic red thread or string connecting the lovers. Destny fulfilled as lovers who tie the red string to each other's finger will find each other because of being tied together. Love the reincarnation in both series as well.

It is the first series the actors of Phum and Peem (Pond and Phuwin) acted in together. It is also a rom-com and although the characters are very different, they have a similar dynamic. For example, Phuwin's character (Pi) is a tsundere like Peem and Pond's character (Mork) is very down bad for Phuwin's character similar to how Phum is for Peem.

The actors of Phum and Peem are the main characters and couple in Never Let Me Go. It is their second series acting together and the one previous to We Are.

Both depict a high school aged female lead with a terminal illness and a bubbly persona, and male leads that don’t have any large reaction to learning about the illness. Acting is wonderful, and each movie depicts unique and meaningful friendships amongst the characters. Both movies have unexpected twists and turns with emotional voice overs/narrations.

-Thai Bls
-Curse
-Horror
-Both are adapted from novels
-Both have the second lead helping them break the curse

-Thai BLs
-Both are action dramas
-Leads are able to see the future

-Thai BL
-Vampire plot line

-Both are BLs
-Vampires
-Have a relationship between a human and a vampire

-Thai BL
-Comedies
-Vampires

-Thai BL
-Vampires

Very similar vibes of maturity I think both shows do a good job of showing how many people feel in real time. Has a calming effect almost