Comparison between the GSP-Spec spectroscopic stellar radii and masses (left and right panels, respectively) and those derived thanks to asteroseismic data by Silva Aguirre et al. (2015). The 1:1 relation is shown as a dashed grey line. The colour-codes represent the difference in T_eff and log(g) between both studies. The mean $R_{\star }^{Gaia}$ and $M_{\star }^{Gaia}$ relative differences and associated standard deviations indicated in each panel are in the sense of (Astero - GSP-Spec)/Astero.