Distributions of the difference between v_los predictions and the true v_los across different subsamples of the Disc, the total Halo, and the stars belonging to substructure in the Halo. The top panel sample is from the Gaia RVS catalogue and includes v_los estimates our PDF’s the median and peak maximum values. The bottom panel shows a sample of stars from surveys crossmatched with Gaia and includes v_los estimates from Naik24. The tables contain the median velocity error for the different velocity predictions across the different subsamples.