Histograms of the values used to calculate the OS_N (top) and NN_N (bottom) statistics. The dashed red lines correspond to the OS_N and NN_N mean values, the continuous lines correspond to the median values. The OS histograms were produced using the observed CAMSA and CAMSB orbits (left), the CAMSA and KD0.1 (middle), and the CAMSA and KDns samples (right). The NN histograms correspond to CAMSA, KD0.1, and KDns samples, respectively. For the KD0.1 synthetic data, the histograms are considerably different from the remaining ones.