Impact of varying the choices of the SED modelling component on the mean of the tomographic redshift distribution bins. Each panel shows a different tomographic bin, from the lowest (left-most) to the highest (right-most) redshift one. Each row represents a different SED modelling component we vary. The scatter points represent the difference between the mean redshift per bin obtained with the fiducial PROSPECTOR-β model and that obtained by varying one SED modelling component at the time. Orange scatter points are obtained by weighting the P(z|c_i) for the number of simulated galaxies per SOM cell, while light blue points are obtained by weighting the P(z|c_i) for the observed abundances in the Masters et al. (2015), McCullough et al. (2024) SOM cells. Circle-shaped, star-shaped and diamond-shaped scatter points refer to the cases where we perform an i-band magnitude-selection of the sample of galaxies that is different for each component, matched for the total number of galaxies and based on the fiducial i-band distribution, respectively. We report the mean errors on the difference of the tomographic bin means estimated via bootstrap resampling in the black boxes in the bottom right-hand corner of each subplot. The blue and red coloured bands refer to the Rubin-LSST Y10 galaxy clustering and weak lensing requirements, respectively.