Comparison of stellar parameters between a sample of the HARPS spectra with spectra convolved to the resolution of 48 000 from a purely spectroscopic analysis (Run 0). The panels show the differences (HARPS-Convolved) in T_eff (upper panel), log g_trig (central panel) and [Fe/H] (lower panel) as a function of the respectively parameters. The shaded areas correspond to the 1 σ of the differences from the median. The dashed lines show the median differences for each parameter while the solid lines are zero.