Left: Dark matter density profiles of haloes in the mass range log M_200c = [10¹² − 10¹³] M_⊙ in the 50/A run, for the CDM (black), vSIDM (green) and SIDM1 (blue) FP runs. We only show the profiles for r ≥ ϵ_DM. The vertical dashed line marks r = 3ϵ_DM, while the grey band shows the range used to measure γ_DM. Right: Inner slope of the dark matter density profiles from the left panel, plotted as a function of halo mass for the three runs and coloured by the stellar half-mass radius r_*, 1/2 of the central galaxy.