Top: Redshift distributions of the mocks built from the DUSTGRAIN-pathfinder (red dots) and SLICS (blue dots) simulations, normalized to 30 galaxies per arcmin². These correspond to a Fu et al. (2008) fit to the Laigle et al. (2016) COSMOS2015 catalog after removing galaxies with magnitudes I_E ≥ 24.5 and i′≥24.5 for DUSTGRAIN-pathfinder and SLICS, respectively (red and blue histograms). Bottom: Fractional difference between the DUSTGRAIN-pathfinder and SLICS redshift distributions. The difference is always below 5% except for redshifts lower than 0.2.