Method to method comparisons for the UVES data: RV differences are plotted against the effective temperature. The blue points are the measurements obtained for the SEP targets, while the red disks represent the Gaia RV standards. The blue boxes extend from the lower to the upper quartile, while the whiskers cover the range of values without outliers from which the median was computed (red horizontal bar). The T_eff is taken from the results of the template optimisation with PCOR (Sect. 4.1.2).