Upper panel: Nine clusters β_sym(r) (color-coded in order of increasing redshift with increasing color wavelength, from blue to brown) and their weighted mean velocity anisotropy profile ⟨β(r)⟩ (dash-dotted black line) compared to the mean profile of 112 halos in the GAEA simulation (triple-dot-dashed gray line) and its rms (gray shading). Lower panel: Same as the upper panel, but the comparison is made with the mean profile of 25 halos in the RF simulation.