Comparison between our iron-peak abundance ratios (large black dots), those of Paper I (large black open circles), high-resolution measurements listed in Table 12 (large dark grey dots), field stars belonging to the thin disc (light grey dots, Reddy et al. 2003), and to the thick disc (tiny light grey dots, Reddy et al. 2006). Errorbars in our measurements are the quadratic sum of all uncertainties discussed in Sects. 3.2 and 3.3.