Comparison of Gaia parallaxes with distance estimates from MSC (panel a; astrophysical_parameters.distance_msc) and GSP-Phot (panel b; gaia_source.distance_gspphot) for 2253 known spectroscopic binaries from Pourbaix et al. (2004) (red points) and 10 407 from Traven et al. (2020) (blue points). We quote the mean absolute differences (MAD), the absolute difference at 90% confidence (AD90%) and the rms differences (RMSD) to the measured parallax for the two samples in both panels. The panels show the same set of stars with estimates from both modules. The anti-diagonal dashed line highlights the parallax as inverse distance.