[It's such a tonal shift he's left speechless, mouth gawping uselessly as he tries to shift mental gears.]

Um... I... I don't, I'm not, um, I'm not really the g-guy to ask about that sort of thing? I d-don't know enough about your world to definitively s-say what's different or not so I'd probably just tell you a l-lot of useless things that don't really matter...

Sorry, I know I'm not much help at all this.