Comparison between the difference of the l.o.s. velocity measured by GALAH and APOGEE-2 on the top panel, as well as the difference of the velocity transformed by the SPECTROTRANSLATOR algorithm and the APOGEE-2 data on the bottom panel, as a function of the l.o.s velocity measured by APOGEE-2. In both cases, the symbols show the stars of the training set. The histograms on the right panels show the distribution of the difference between the l.o.s. velocity measured by GALAH and APOGEE-2 (on top) and between the transformed GALAH l.o.s and the “original” APOGEE-2 values.