The title say that they should be fully different movies, but these two has similar plot and A Taxi Driver is more worthy to watch than this. The both movies show war between public and the police even though in Psychokinesis, they are not real police.
Psychokinesis was inspired by by a real life tragedy that took place in Yongsan in 2009 and The Remnants explores the aftermath of Yongsan by following the lives and relationships of survivors of the tragedy.