Comparison between the L-FP and the SM-FP as a function of redshift. The panels show the evolution of FP coefficients b (top) and c (middle), and the zero-point offset, Δa = a_z − a_zi (bottom). Results are shown for two stellar mass-selected samples: a massive sub-sample with M_* > 1 × 10¹¹ M_⊙ (red) and the full sample with M_* > 2 × 10⁹ M_⊙ (blue). Solid lines correspond to the SM-FP, while dashed lines indicate the L-FP.