Comparison between fitted parameters of mock images created with either isothermal (dashed green) or composite radial mass profiles (plain red). The mock lensing mass models display both ellipticity changes and twists based on the observed morphologies, using the Kormendy et al. (2009) sample. Only θ_Es = 1″ lensing galaxies are displayed for the isothermal cases in order to match the Einstein radius of the composite mock images samples. Only fits with resulting χ² <  1.5 are considered. The four right cells of the second row display identical distributions, as the same population of twists and ellipticity changes are used to create the composite and the SIE mocks, and all the fit results have sufficiently low χ².