Im a little confused as to the exact difference bettween the Galaxy sizes past large. It seems like Huge has the same number of stars/star systems as large, but theres just more space between them. Gigantic is the same, just with more space than even huge has between the star systems, but again, not really more. In gigantic theres TONES of empty space. That gets pretty annoying as it kind of defeats the purose of having more that large.
-Note: In galaxy set up I have the number of stars and the number of planets at abundant....but there not that abundant.