Models considered. For model comparison, we compute the evidence (see Sect. 5.2) for each source and model. We then start by assuming a power law (powerlaw) and move along the arrows to more complex models if model comparison justifies the preference. The three obscurer models, wabs, sphere and torus, are compared against each other, as well as the introduction of additional features (+scattering, +pexmon). See text for details.