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Earth-1B was an unofficial designation of the universe that the third volume of the Super Powers series takes place in.
List of similarities
- In both universes the Justice League are referred to as the Super Powers Team.
- In both universes the Super Powers Team's headquarters is the Hall of Justice. (Note: On Earth-One, there never was a Hall of Justice)
- Robin is a member of the team on both earths, whereas on Earth-One, he's only part of the Teen Titans, and he was known as Nightwing at that point.
- Samurai exists in this reality as well as on Earth-1A. There has yet to be any indication of Samurai existing in any other reality within the DC multiverse, except for Earth-96 (which was a hypertime reality) and Earth-22. (which is part of the new 52 Earth Multiverse.)