It’s always an imperfect exercise to compare complex software to deduce the differences between each. How you define “post production” is also a factor. Let’s say you’re asking according to the context of this video where post production means color adjustment, vignette addition, and other simple photo manipulations.
In that context, I can use Photoshop and Blender’s Nodal Compositing to achieve the exact same post-processing effects. At that point the choice becomes which UI do I want to work with. Each has subjective pros and cons, but for you question, they are equals imo.
However in a broader, more complex Post Processing context where artists are rendering multi-pass/layer .EXR’s, adding artificial depth-of-field, post processing animations, etc I find Blender to be more apt for that than Photoshop.
It’s a big question that’s hard to answer concisely but I hope that helps.
