It’s not an entirely unreasonable thing be concerned about. [She says it gently, carefully, not wanting Loki to think that she’s already certain he will end up like the one from her world.] But you aren’t him, and our worlds aren’t the same, even if they’re really similar.

[Even if they both have Tony Stark. Pepper’s heard enough about the version of him from that universe to make sure her Tony never becomes like him if she can help it.]