Summary of the metrics (from left to right, median bias, scatter, fraction of outliers, and Pearson coefficient) in bins of of ‘observed’ magnitude in the i-band (and average S/N in the narrow-band filters) for the age (green), metallicity (blue), and dust attenuation (red) predictions. The empty circles are the metrics obtained by means of SED-fitting (details in Sect. 5.1) on the i∼ 17 mag bin, highlighting the improved performance of the NN estimates.