"The Legend of Shen Li" and "Fangs of Fortune" are both romantic, fantasy and wuxia dramas featuring teasing, playful main couples in a fantasy universe. The male and female leads are independent and capable, and their romance develops slowly amidst cute moments and adventurous challenges.
The protagonists find themselves embroiled in escalating conspiracies involving deadly betrayals and struggles for power.

Similarities:

Genres of both dramas are fantasy, wuxia and romance.
Both dramas have element of xianxia and comedy
Both dramas has strong badass great demon ML and determind bold FL.
Main leads go through many hardships together.
Both dramas involves humans, demon, gods, immortals.
Demon ML and FL learn to trust and understand each other after facing many obstacles and their love become strong enough to overcome any limitations.
Amazing sound/visual effects, gorgeous costumes and top tier cinematography.
Both dramas are released by IQIYI.

SIMILARITIES:
- Both have Strong Friendships and a lot of bromance and character development.
- Solve mysteries together and have to complete missions at the cost of their  life.
- They help each other out and strong responsibility of saving the world from chaos rests on their shoulders. 
- Great dialogue, costumes, comedy, story develops properly.
- Great OSTs sung by leads and supporting characters
- There are past stories unraveling while new present plots are developing.
- Both have main strong leads and supporting characters who fight against injustice and protecting the weak.
- One main lead is demonic cultivator hated and looked down upon and greedy people are hungry to take his powers and the other main lead is very respectable role model. Role model ML has to rethink his principles and teachings to learn to stand beside his bff demonic cultivator to fight for good and bring peace to world.

Both dramas have fantasy, friendship, comedy, wuxia, martial arts and youth elements. Both dramas have past stories and developing plots. There are multiple main leads and there is light slow burn romance. The plot involves people hating and hunting demons, while the main characters try to unfold the real villian's grand plot.

Story deals with demons, mortals and immortals
Strong, wise, kind hearted & badass female leads; Strong & devoted male leads
A romance/love story portraying that leads can sacrifice their lives for the others.
Love/Hate relationship & torture
Wuxia and xianxia elements

Both are romance, mystery, fantasy, comedy and wuxia dramas. Both have similarity in plot too. In The Legends demons are hated and misunderstood while the so called orthodox sects kill demons indescrimately and are honoured for that. In the shadows these righteous sects use demonic techniques to become powerful. The demons make a sect of their own to prove how they can be righteous, kind and just.