Yes, I think people are definitely shaped a lot by their experiences beyond their 'core' personality. Their time at the SGC would have given them many similar experiences, but they might differs a lot in the way each would process those experiences. I admit I'm not delineating ahead of time the ways in which they're different so much as I'm letting them evolve as the story progresses, but you're definitely right that they're not going to end up as the same person. Even the relationships with the team isn't exactly the same as it is in canon, I think.

Thanks!