I think we are deep in 'it depends' territory here.
Albedo is about how much of the light is absorbed at all or bounced straight back into space. For light that is absorbed, altitude (the amount of greenhouse gases between them and vacuum) matters.
Dust or clouds in the upper atmosphere might absorb or reflect more light than the surface, but some of what they do absorb will re-radiate out into space. Dust clouds and real clouds are three dimensional, cloud density is limited by air temperature, and dust availability generally limited by rainfall. That's gonna be some pretty complex math, so I wouldn't be surprised if models disagreed.
Albedo is about how much of the light is absorbed at all or bounced straight back into space. For light that is absorbed, altitude (the amount of greenhouse gases between them and vacuum) matters.
Dust or clouds in the upper atmosphere might absorb or reflect more light than the surface, but some of what they do absorb will re-radiate out into space. Dust clouds and real clouds are three dimensional, cloud density is limited by air temperature, and dust availability generally limited by rainfall. That's gonna be some pretty complex math, so I wouldn't be surprised if models disagreed.