If you type:
3dinfo -space -av_space FILENAME
on either of those files, you will see that they are marked internally as being a special, "non-original" space. The NIFTI file name doesn't show that explicitly, but it is marked in the header info internally for the file.
From the 3dinfo help, these properties are showing you:
-space: dataset's space
-av_space: AFNI format's view extension for the space
These things relate to AFNI's use of templates and atlas information, with the "whereami" function-- being able to jump around to locations marked in atlases, or to be able to estimate one's location with respect to known atlases.
--pt
