Always go with the original.
The Departed is strong, and, while Martin Scorsese should have won his Oscar for a landmark film like Taxi Driver or Raging Bull, it’s worthy of its honors.
But don’t sleep on the Hong Kong crime thriller which provided Marty his inspiration.
The first in a crackling trilogy, Infernal Affairs is a sleek, intense descent into Hell, as a cop and a crook hide in rival worlds, each one intent on staying alive by rooting the other out first.
You may know the plot, but pay respect to those who crafted it first, and best.