Top: photo-z quality log(Qz) for ∼4k PAUS-DEEP2 matched galaxies, as a function of their spectroscopically determined redshifts z_spec., with red and blue colours reflecting the LEPHARE classification of the galaxies (see Fig. 3, top-left panel). A smaller value of Qz indicates a higher-quality photo-z estimate. Bottom: PAUS photo-z estimates vs. DEEP2 spec-z, again coloured by galaxy classification. The 1-to-1 relation is shown in the bottom panel as a faint yellow dashed line.