Results of the cosmic shear measurement with KSB on 10⁶ simulated galaxies at fixed magnitude, once with realistic galaxies from the deep learning model, and once with their double-Sérsic counterparts. The plots show the relative difference between separate bias estimates on both branches, realistic and parametric galaxies. The red curve shows the best-fit antisymmetric quadratic model according to Eq. (D.1). Inside the plot we summarise the difference Δ of the fit parameters α₁, μ₁ and c₁.