All the planet sprites that were added in https://github.com/endless-sky/endless-sky/pull/3458 and that finish with -b seem to never be used by the map editor when randomizing a system or a planet, which reduces differentiation quite a lot
The sprites and commodity lists (including stars) are currently hard coded in the editor. In the future these should be customizable, with defaults drawn from reading the base game locations.
All the planet sprites that were added in https://github.com/endless-sky/endless-sky/pull/3458 and that finish with -b seem to never be used by the map editor when randomizing a system or a planet, which reduces differentiation quite a lot