Ok, with hindsight it does need explanation.
There are two-variants of "blight"; the actual Blight (which we cannot even enter) and Dark Clouds (which can be travelled through and controlled as normal, but suffer some stat penalties). The first map is from before the introduction of Dark Clouds, so you can easily tell the difference between Blighted and Unblighted regions. Unfortunately in the second one, the overlay makes it difficult to tell the difference between Blight and Dark Cloud by colour alone.
An easier way to tell if a region is Blighted or not is to see if the borders show up. For example, you can see the full borders of the regions south of Sint (which are Daimon controlled, but only covered by Dark Clouds). By contrast, you can't see the borders of the regions south of those, which are fully blighted.
