Thanks for the extra detail. Based on what you've said, it does seem as though they are distinct characters, so I'm leaning towards saying that the way to handle this that would be consistent with other fandoms is to have a character tag for each one that appears in the film, and then "Original Jack Clone" and "Original Vika Clone" tags as well. I'm conscious that would use rather more character slots, though - I'd be willing to add them behind the scenes to make it work in this instance. (Or if you have a helpful friend with spare slots they could add the extra ones?)