★ 6.5 Film
Young and Dangerous 2
1996
Same creator (Andrew Lau Wai-Keung); both explore triad
★ 7.8 Film
Infernal Affairs
2002
Same creator (Alan Mak Siu-Fai); both explore undercover
★ 6.5 Film
Extraordinary Mission
2017
Same creator (Alan Mak Siu-Fai); both explore police and undercover
★ 6.1 Film
Johan Falk: Operation Nightingale
2009
Both explore police and murder; both action and thriller
★ 6.7 Film
The Memory of a Killer
2003
Both explore murder; both action and thriller
★ 7.2 Film
Pusher III
2005
Both explore gangster; both action and thriller