This kind of reminds me of when people sat on the other side of the planet and claimed Breivik's victims were sims too.

The image you are comparing with was not taken a week before the shooting. It is two years old I believe it was revealed in one of the threads we've had about this already. So a little girl at that age doesn't change much in two years huh? Well, it's enough time for her to outgrow her red dress and her little sister to grow into it, who coming from the same gene pool, looks much like her sister at the same age. The third girl in the photo is not from the same genes, but is apparently similar enough to confuse some people who perhaps forget to factor in growth and time and what not.