I'm fairly sure that section is talking about compiled code, structure of the app, the archive, etc, considering it says "compiled ahead-of-time, never interpre

I'm fairly sure that section is talking about compiled code, structure of the app, the archive, etc, considering it says "compiled ahead-of-time, never interpreted, and you access the entire set of iOS public APIs." the previous paragraph. You're right though, there's no reason the UI wouldn't look identical as well.