Comparison of the TRGB DM based on the first- and second-order derivatives (top panel), and the difference plotted against (J − K_s) colour (middle panel) towards the 14 los containing dEBs. The one-to-one relation is shown in the top panel. In the middle panel in blue are indicated the median of the difference (solid line) and plus-minus the dispersion (taken as 1.48 ⋅ MAD; dashed lines). The bottom panel shows the difference between the second-order-derivative-based TRGB distance and the DM of the dEB systems against colour. The median of the difference (solid line) and plus-minus 1.48 ⋅ MAD (dashed line) are shown as the blue lines.