Comparison of retrieval results for constrained planetary parameters and atmospheric abundances in the MOD-CF case (blue, square marker) with results from Paper III (brown, circular marker) for input spectra with the same properties (wavelength coverage 4-18.5 μm, R = 50, S/N = 10). The vertical black lines indicate the true values assumed for the parameters in each study. For parameters where we assumed a non-flat prior, we indicate the prior range (black, pentagonal marker). The error bars on the constrained posteriors denote the 68% confidence intervals.