Comparison of the distributions of the inner gradients of the stellar age (left-hand panel) and metallicity (right-hand panel) profiles for type-I (green), II (blue), and III (red) galaxies from RaDES with the CALIFA mass-weighted distributions (TRL17, symbols with transparency). Zeus is again represented by a green diamond (type-I galaxy with signs of ongoing interaction). Typical errors in the gradient values for the observations and the simulations are shown with the black error bars within the boxes (left, typical errors in the CALIFA values; right, typical errors in the case of the gradients from the simulations).