Both dramas have vengeful rich and powerful heroes.

Both heroes want to destroy the heroine`s father,but in "Roy Lae" the heroines father are dead,so the hero takes vengeance on his three children.

Both FL`s have one sister and one brother,and both FL`s sisters falls for the hero.

There is forced marriage in both dramas.

Both have hate to love relationships!

Both have main-leads who belongs to a Mafia empire and are rich and powerful fighters.

Both dramas have slap-kiss scenes.

The same goes for intensity and angst,both dramas have great deal of it.

Both have the Twin-sisters trope where one sister a good-hearted Nangek and the other Twin a evil and bitchy Nangrai.

They are remakes.
The story "Sao Noi" is about an islander girl trying to win back the love of her life, San/Siam...and has to become a sensual theatre actress Wanida to do so.

It has the same bodyguard trope and both male-leads are Lieutenants and are the best on their work. Female leads have the same stubborness and spirit,and does sometimes act spoiled and puts themselfes into trouble in which the male-leads always have to save them. There is also suspense in both dramas.

They are both similar stories,just that the newer one is a remake of the older one.Tik won many Viewers hearts in the 2001 version in the role of the rebellious younger brother Barupah.

This is the similarities between both series:

1. Both have the same duration of 12 episodes and have sequel movies.
2. Have fights between gang-members and always strives to be NUMBER 1 of all the gangs.
3. Friendship, loyalty and honor has strong presence in both series.
4. The male-lead is the strongest!

The plots is almost the same while the story-lines are different. Both have self-absorbed and Hi-so heroines who bullies the heroes from the start. Both leads grow up in the same household, and both heroes are adopted by the heroines father. There is marriage-of-convenience in both dramas. A hate-love relationships also between the leads, and the hero secretly loving the heroine all the time.

Both have this paranormal genre, while the male-lead is an alien in "Star" the female-lead is a mermaid in "Legend", and both have super-powers as creatures. Both series follows up the path of true love through reincarnation, humor and excitement! And lastly, both dramas have Gianna Jun in role of the Female-Lead !