Similar film that I liked better, anyone else see it?
SELF LESS had a similarity to this. A group of powerful criminals achieve a form of immortality by having their consciousness transferred into other people's bodies. They are not clones but kidnapped people.
One very interesting difference is that unlike Sixth Day the person LOOKS completely different in the new body, and the actors have to be really good to pull off being the other character since the actor changes each time. The main hero in the story can only tell who the person is by "detective work". For example when he encounters a man with a fancy gold necklace he recognizes it as the necklace of a different person he killed earlier in the movie and realizes that the guy took back his necklace once he had had his mind transferred into a new body. One of the villains had a nervous tic and he remembered seeing the same nervous tic on a much older man earlier in the story and put two and two together and realized it was the same person.