Median minor-to-major axis ratios as a function of the halo mass (M₂₀₀) considering only star particles for halos at z = 0. The connected black, blue, green, and magenta data points exhibit the results for the FP runs considering different DM models. Error bars bracket 25 and 75% of the distribution, displayed only for the CDM case. The left, central, and right panels show the measurements at the halo boundary radius (R₂₀₀) and at 50% and 10% of its value, respectively. The dotted black curve shows the recalibrated Bonamigo et al. (2015) model for the (c/a)_R200 as measured from all particles in the CDM run. The arrows in each panel indicate the percentage shift of the total-matter c/a relation required to match the minor-to-major axis ratios of the stellar component as a function of halo mass.