A main character (FL vs. ML) is thought of as dangerous and hunted down/attempted to be killed by the "good" people. They are saved and protected by the other lead. Both have similar tones and settings, and excellent battle scenes.
Both are Xianxia romances with many fascinating, complex characters. Similar elements include spiritual pets, settings, and tone.
The main character ends up inside a drama or story and ends up changing the plot. Both are short fun Chinese dramas with a similar vibe and neither plot takes itself seriously.
Despite differences in plot (L&tE has fantasy elements), FL is a servant who falls in love with royal ML. Their relationship is sweet and lovely and the plot has many fluffy moments with some serious ones.
FL travels to a different world through technology. ML appears to be the villain, and it takes time for the FL to warm to him/fall in love with him. FLs are quirky and fun.
Similar vibe, FL travels to a game vs. into a drama and must beat the system. Similar setting and fun, fast paced plot.
Arranged/forced marriage turns into true love. ML has some problem only the FL discovers and is able to cure.
Similar vibes and relationship between the main characters. Both shows start off sweet and funny then take a turn into heavier court politics and assassination attempts, with a final happy ending.
Similar tone and setting and romance. The emotional sacrifice scene in part 2 of The Blue Whisper parallels the scene in Ashes of Love. Both are beautiful, fantasy/historical cdramas with interesting, complex characters.
Historical Chinese dramas with a poisoned ML who has lost something because of it (his emotions or intelligence). The FL is able to cure/help him.
FL has another, dangerous identity that people believe can destroy the world. The ML is determined to protect and save her at all costs. Both are historical/fantasy Chinese dramas.
FL has another identity hidden in her that people fear. ML tries to protect the FL. Both couples have an unusual relationship of master/teacher or master/servant with an age gap between them. Fantasy/historical setting with many supporting characters.