There are two options for the Placemark Globe dataset:
This is "Visionscarto’s “World Atlas”, which is very well-described by the linked document. It's based on Natural Earth but includes some changes:
- Western Sahara as the UN point of view
- Crimea as part of Ukraine
- Increased width of Gaza strip to avoid it being removed by simplification
Most of the other changes are irrelevant for the purposes of Placemark Globe.
This is the Natural Earth default dataset as processed by world-atlas.