Differences in the retrieved chemical abundances between the standard N-point profile (X_NP) and a simpler isothermal profile (X_iso). In the left panel, the differences are shown as absolute differences in the logarithmic VMRs ∆ log X, whereas in the right panel, the differences are scaled by the combined uncertainty σ calculated by adding the individual 1σ interval widths of the VMRs in quadrature. For the cases of significant detections the median abundance is used for the comparison, while for non-detections the upper 95th percentile serves as the reference point.