Comparison between Walker et al. (2023) MMT/Hectochelle and Magellan/M2FS spectroscopic results and our VLT/FLAMES results for the stars covered by both surveys. We compare with our final sample of members (G< 19.7mag, S/N> 10 per pixel). In the upper panel, we plot the υ_los comparison of the two surveys and in the lower panel, [Fe/H]. The blue solid points are from the MMT and the red points are from the main M2FS survey. The green stars come from the medium resolution M2FS sample. The dashed lines are at zero and the dotted lines are the mean offset between the two surveys, (v_Walker + 1.7 km/s and [Fe/H]_Walker + 0.22 dex.