The greatest point of difference between "Black Cat" and "La Femme Nikita" or "Point of No Retrun" is that Jade Leung had a microchip implanted in her brain. This means that the growing moral dilemma that faced by the protagonists of the French and American movies isn't really an issue here. One of the main themes and points of conflict in "La Femme" and its American remake occurs when the newly trained and tested killer goes to live in the real world and (of course) falls in love with a regular guy--what happens when a woman who is a brainwashed killer feels love?

Not an issue in "Black Cat" since that implant means that the assasination bureau never loses control of her.

"La Femme" was also much more economical in setting up the story--Stephen Shin Gei Yin made his decisions on what to get put on film but it made the story structurally weaker. In "La Femme", Anne Parillaud's Nikita simply shoots a cop during a robbery and winds up headed for the gallows. Jade Leung's Catherine endures several beatings at the hands of seemingly interchangeable vicious thugs and police officers. Because so much time is spent having Catherine sufficiently brutalized the rest of the story has to be truncated leaving a string of decent action scenes which makes less and less narrative sense as the movie draws to a close.

Worthwhile if only to see the lovely Jade Leung shoot firearms, beat up men twice her size and cut a bad guy's throat.