I bet you both are different. It's true You should treat both reds and greens in exactly the same way. So far, the red trait comes with no harmful defects.
You've demonstrated that the personalities of both are not predictable. You have to wait two years and apply pertenent training to see any iguana's final, "permanent" behaviors. And even so, rarely, mild mannered 5 year olds' suddenly change their entire behavior.
I think this is an interesting story:
Henry Lizardlover's (Look this up on your computer) iguanas are naturally calm and patient enough to act out parts in movies. These are genetically determined behaviors.
To select other igs, Henry says he gathers a large group of baby and young iguanas, and puts them in a big arena. He walks among them, picking some up. To him, the least negative igs are the most naturally calm and have a high chance of having a lifetime of relaxed personality. He buys those. But I'm sure some of his igs flip, becoming eager to bite, etc.
He says we should avoid all the stress of taming by picking iguanas his way.
He doesn't like to display his iguanas any more because he gets lots of irrelevant criticism. People sometimes get the invalid conclusion that Henryy's igs are mistreated in some way, especially those that wear jewelry. Such as coerced behaviors. They think he ties them down to make them hold poses.
Read Henry's side of this issue.