Top two panels: Evolution of the longitudinal ﹩\left({P}_{xx}\,\rm{, solid lines}\,\right)﹩ and transverse ﹩\left({P}_{\perp \perp }\,\rm{, dashed lines}\,\right)﹩ pressure of plasma ions (green), plasma electrons (cyan), and CRs (red) in the plasma ion rest frame, for the monenergetic (top) and power-law (middle) CRs with a similar ξ ≈ 66. The net magnetic pressure (orange) is P_B = B²/8π, where ﹩{B}^{2}={B}_{0}^{2}+{B}_{\perp }^{2}﹩. After saturation, isotropization of CR pressure components for MEI:22 is apparent, whereas they remain anisotropic for PLI:5-400. Bottom panel: CR drift v_d in the plasma ion rest frame, normalized to the Alfvén speed v_A. After saturation, sub-Alfvénic CR drifts cease further magnetic field growth.