Comparison of posterior distributions for selected best-fit parameters of GQ Lup B, highlighting differences between our fiducial model (with DG) and the fixed PT profile model from Xuan et al. 2024a (X24). Dashed lines in the corner plot represent the 16th and 84th percentiles of the distributions. Derived C/O and ¹²C/¹³C values are displayed in the top-right corner, with the dashed grey probability density indicating the values reported by X24. The middle-right panel shows the retrieved temperature profiles, while the rightmost panel presents the corresponding temperature gradients.