Predicted versus observed values of [a_meso/a_meso,⊙, a_gran/a_gran,⊙, b_meso/b_meso,⊙/b_gran/b_gran,⊙], using the best-fit scaling relation from Table 1. Points are color coded by evolutionary phase (RGB: green triangles; pRC: red circles; sRC: orange diamonds); error bars reflect measurement uncertainties. The red dashed line marks the one-to-one relation; the shaded blue band shows the ±2σ scatter about this relation.