Comparison between stacked central density profile in the DMO runs. We report collisionless DM density profile as a blue solid line, rSIDM as a green dashed line, and fSIDM as an orange dotted line (note that rSIDM and fSIDM lines almost overlap visually). Shaded areas correspond to one standard deviation of the six regions. The upper panel shows the central density, normalised by the average density at R_vir for our six regions, while the bottom panel shows the ratio between the profiles of the SIDM runs and the collisionless DM runs. The grey shaded area covers one standard deviation around the fractional fiducial DM softening 2.8 × ϵ/R_vir.