After rendering basically every permutation of the material using Substance renderers (Yebis, Iray) in various Substance material authoring / texturing softwares, I think I have to backpedal on my earlier assertions, because it appears I've misunderstood or miscalibrated Substance Designer.
Looking at the various renders (displacement exaggerated for effect) it appears that Substance Painter Iray render and Corona (tonemapped) render are the most visually similar to the preview renders from Substance Source.
The Substance Painter Yebis and Iray renders differ significantly in terms of the normal map response - AO response? It looks like the self-shadowing is completely different, perhaps because the shadows are being calculated from the normal map in Yebis but from the geo with Iray?
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substance source preview
vpq_substance_source_preview_1
vpq_substance_source_preview_2
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vpq_
corona_linear
vpq_
corona_tonemap_5.0cm
vpq_
corona_tonemap_1.0cm
vpq_substance_
designer_iray_cw
vpq_substance_
designer_iray_default
vpq_substance_
designer_viewport_cw
vpq_substance_
designer_viewport_default
vpq_substance_
painter_iray
vpq_substance_
painter_viewport
vpq_substance_
player