EPN.S and ATLAS^3D samples compared in the stellar mass versus ellipticity plane. The ATLAS^3D sample of ETGs is displayed with gray open symbols (triangles for the FRs, circles for the SRs). For these galaxies we show the ellipticity values from Krajnović et al. (2011) and M_* = M_JAM = (M/L)_JAM × L_tot,r from Cappellari et al. (2013b) as in their Eq. (28). The ePN.S galaxies are shown with full symbols: red circles for the SRs, blue triangles for the FRs, and green squares for the FRs with triaxial halos. For the ePN.S ETGs M_* is the mean between M_JAM (Cappellari et al. 2013b, when available), and the masses M_*1 and M_*2 reported in Table 2. The error bars on the mass show the rms scatter between these different mass determinations. The values for the ellipticity are listed in Table 1.