Well, I have to indulge my inner pedant:
As I learned it, the failure drill includes an immediate shot to the head with no pause or assessment. In the failure drill, you shoot the two shots to upper center torso then immediately shoot one in the triangle formed by the eyes and nose. Whether or not it was necessary is immaterial because it's going to happen.
By contrast, the Mozambique includes the assessment as to whether or not the head shot is needed.
As I learned it, the failure drill includes an immediate shot to the head with no pause or assessment. In the failure drill, you shoot the two shots to upper center torso then immediately shoot one in the triangle formed by the eyes and nose. Whether or not it was necessary is immaterial because it's going to happen.
By contrast, the Mozambique includes the assessment as to whether or not the head shot is needed.