Density plots comparing GSP-Spec MatisseGauguin parameters with literature data (APOGEE-DR17, GALAH-DR3, RAVE-DR6). Green and grey show the best- and medium-quality subsamples, respectively (see text for details about these samples). The histograms inside each plot show the difference between the literature and the GSP-Spec parameters. Mean (μ), standard deviation (σ), median, robust standard deviation (derived from the MAD), and the number of stars (N) of the offsets for the best-quality subset are annotated inside each box.