Comparison between the performance of the two networks under study (in all panels, the VGG and SC-VGG results are shown in green and in cyan, respectively). Top panel: statistical performance estimators for the GGSL and non-GGSL classes. Middle panel: ROC curves for the GGSL classification, i.e. TPR vs FPR (the lines and the coloured areas represent the mean and the 1σ level, respectively); here, the AUC values are quoted in the legend and the normalised confusion matrices are also shown. Bottom panel: box plots for the GGSL metrics and AE for both classes (see Sect. 4.1 for details).