Generally that is due to the pre-prep of the surface before. Both processes are there to remove tooling marks.
To do that the 'dust' surface the raw part is sand-blasted. This doesn't remove much material. It is even.
To polish requires, normally, a person to run it under a buffing wheel with a polishing compound long enough to remove the tooling marks. Due to the shape of the polishing wheel and related action they need to remove more material to get a surface that doesn't have tooling marks.
Sharp edges get lost in the polishing process, whereas they normally are retained in the dust process.
The anodizing to an extent does far less to affect those details.