Yeah, I think an important point is lost in those comparisons: the degree to which the landmasses actually differ. When the episode came out I tried to compare Miura's shots with various 3D global maps positioned as close to the angle he uses as I could, and I found that there was just no way to get a good match. They're deformed, but beyond that I believe the scale itself is wrong.
For a change of pace, instead of trying to make a map fit the angle of Miura's shot, I tried flattening Miura's shot into an overhead map, using the rudimentary method of flattening the white light emanating from Ganishka appear as a circle. It turned out better than I expected, and makes for easy comparison with a map of Europe provided inside the circle.
As similar as it is to Western Europe, one can see things become quite different the farther East you go, much of the landmass being replaced by ocean.
Even just comparing the two shots of the planet we see in the episode brings up divergences, like the fact the epicenter of the astral "explosion" as seen from the moon is not where it would be in our world.
Yeah, that's strange, and difficult to determine whether the divergence is one with Miura's world as compared to the real world, or a divergence between the different shots of the light itself and it's progress covering the planet.