Ratio of the radii from SBCRs and from asteroseismology as a function of masses and radii estimated through the scaling relations. Top row, left: Radius ratio using the Pietrzyński et al. (2019) SBCR. The red and blue points correspond to RC and RGB stars, respectively. The dashed black line is a LOWESS smoother of data, and the dotted line serves as a visual aid. Top row, right: Same as in the left panel, but using the Salsi et al. (2021) SBCR. Bottom row, left: Same as in the left panel of the top row, but as a function of the asteroseismic mass. Bottom row, right: Same as in the left panel, but using the Salsi et al. (2021) SBCR.