The western version had them visiting other planets all the time, but the original show was set entirely on Earth, the team's impressive genocidal campaign against Zoltar's henchmen (who was a hermaphrodite in the Japanese version) was changed via editing to be directed against robots, and Keyop's dialogue was made into beeps and whistles because the original Japanese dialogue was pornographic filth (usually) aimed at the token bird in the group - which is why you can still see her visible disgust after he's spoken in many scenes of the English-language edit.
There was an uncut update of the show released under the name Gatchaman in the west, which was quite entertaining in a thuggish way.
