Comparison of the effective temperatures for the 1939 stars of 𝒮₃ with both a Gaia GSP-Spec and GES temperature estimate. The 2D hexagonal bins are colour-coded by the number of stars. The red lines show density levels containing 68, 80, 90 and 95% of the population. The dashed green line shows the 1-to-1 relation, the pink thick line is the linear regression (see text for the parametrisation). The cyan thick dashed line is the LOWESS line. The inset shows the distribution of Δ_eff = T_eff,Gaia − T_eff,GES.