User blog comment:Oknight/Superboy and Superman/@comment-167456-20110307075903

Genetically they might be twins, but really as far as the personal relationship goes that doesn't make any sense. Superboy was made from Superman. He is younger than Superman, looks up to Superman as a role model, and wants to spend more time with Superman. That's a classic father/son dynamic, regardless of the genetics that are in play.

A similar issue came up in Greg Weisman's older series Gargoyles, featuring the character Thailog, who was the clone of the hero Goliath. In that series, Thailog was also treated as Goliath's son, even though (in that series) they were the same age. Here's Greg's response when he was questioned on it: http://www.s8.org/gargoyles/askgreg/search.php?qid=1552