Quirking a brow as he listened to Dean and sort of ignored the introductions. "Sooner for what?" He really wasn't a fan of this Dean so far. Then again him and either Dean's didn't seem to mesh perfectly anyways. It would probably take a while, he was only just beginning to get along with Sam before he got wished away. Winchesters must have been an acquired taste.
"Wait, now theres two?..How can you tell?" Jack certainly couldn't tell the difference, except that the demeanor were slightly off. Dean wasn't crazy from what he could remember.