Slope of the various ϖ_seismo–ϖ_Gaia relations as a function of the weighted average parallax difference for RGB (blue) and RC (red) stars. The results using raw scaling relations (crosses; Sect. 4.1), a corrected ⟨Δν⟩ scaling relation (circles; Sect. 4.2), and PARAM (diamonds; Sect. 4.3) are shown. For RC stars, the line is extended to lower offset values for a better visualisation of how the slope compares with RGB stars when using scaling relations at face value.