Fractional difference in scaling-based radius (⁠|$R_{\mathrm{SC}}$|⁠) and corresponding model radius (⁠|$R_{\mathrm{model}}$|⁠), where the model is found as the best match between the observed pysyd-|$\Delta \nu$| and |$\Delta \nu _{\mathrm{surf}}$| from Isochrone A. The symbols follow Figs 8 and 10. The RGB base and MS turn-off are indicated following Fig. 2. Panel (a) shows the case without any corrections to the scaling relations, and panel (b) shows the case after using the same correction as in Figs 10 and 11(c) and explained in the text.