Manhunt 2's files include alternative sounds for a few existing executions.
The differences are:
Baseball Bat 1, 2 & 3: Basically PS2/PSP sounds but shortened to match with the PC/Wii animations.
Syringe 1: Different voice used at the end
Syringe 2: Same with the default, except the hunter's gurgling voice is longer at the end.
Syringe 3: Uses the PS2/PSP voice at the end.
Tranquilizer Gun: Unique sound.
Light & Heavy Handgun: Blood spurt in the 2nd hit.
Crossbow: Hunter grunts upon being shot.