The relative offset of ﹩{L}_{2}^{\mathrm{QDPT}}﹩ as compared to that of ﹩{L}_{2}^{\mathrm{DPT}}﹩ (see Equations [30, 31]) under the perturbation of an axisymmetric differential rotation Ω(r, θ) as observed in the Sun. An increase in intensity of the color scale indicates worsening of the isolated-multiplet approximation. The measures of offset are plotted for the HMI-resolved multiplets shown in Figure 3.