Every other Earth's description is in relation to this one, specifically the differences between this and the others. So here are some little things about the one Earth this is all based on. (not comprehensive)
blue oceans, green and brown land, and white clouds
huge variety in native species
only one species of people
one moon called Luna
basic space stations
The Earths are categorized into 3 main types, labeled I through III, based on similarity to the Original
Essentially an exact copy of the Original with some minor tweaks, ones that probably legitimately exist in some other timeline or parallel universe. These are often either just called "Earth" or are never referred to at all.
Still very similar to the Original, but with one big twist, such as its shape being different, having no animals besides giant cockroaches, and overall having something "off" about it. These are often called things like "Pandora" "Gaia" or "Terra", but can have unique names like "Nauvis" or purely functional names like "Flat Earth"
Only superficially similar to the Original, and usually having a huge difference between it and the Original, such as a siamese twin. There are no rules for what these are called, but the first one in the database is called "Protogon".Â
Parallel Olelogram Youtube Channel
(the site is somewhere else, but the EAR hasn't heard anything, so no one's bothered to change the link lol)