Difference between observed and synthetic line FWHM as a function of the difference between observed and synthetic line depth for the profiles obtained by Cauley et al. (2019, black), Wyttenbach et al. (2020, orange), and for the weighted average profile (purple). Asterisks and rhombi are for the Hα and Hβ lines, respectively.The dashed horizontal and vertical lines at 0 are to guide the eye. The models best fitting the observed line depths overestimate the lines FWHM, and vice versa. The error bars at the bottom-right corner indicate the size of the uncertainties on the measured line depth and FWHM. The position of the results obtained with the 025 and 108 TP profiles is marked by red and blue circles, respectively.