Comparison of [Fe/H] from this work (mean of MILES and Coelho, see Table 6) with those from equivalent widths of Ca II triplet for the same stars with the same instrument by Saviane et al. (2012) and Vasquez et al. (in prep). The upper panels compare CaT metallicities with those obtained with the MILES and Coelho libraries. The bottom panels are two types of combination of the results: the average of each star on the left, and assuming MILES results for more metal-rich and Coelho results for more metal-poor stars on the right. Below the plots we plot the residuals.