Comparison between stacked central density profiles in the FP runs. DM models are represented as in Fig. 3. Columns refer to the results for DM, stellar, and total matter components, respectively. Upper panels show DM density profiles, while lower panels show the ratio with respect to the collisionless DM profiles. The grey shaded area represents one standard deviation around the fractional fiducial stellar softening 2.8 × ϵ_⋆/R_vir.