Displacements in the sky plane between the observed and model-predicted positions of the multiple images. We show the results for the models EM_spec and EM_phot in red and blue, respectively. For comparison, we also show the results obtained by B23 in grey. The histograms show the distribution of the displacements along the two directions. While the B23 model is based on 237 multiple images from 88 background sources, the EM_spec and EM_phot models are constructed using constraints from 31 multiple images of 12 sources. We quantify the accuracy of each model in terms of the Δ_RMS (see Sect. 6), as reported in the legend. This accuracy also determines the radii of the coloured dashed circles in the figure.