iOS 9.1 vs iOS 9: What’s New in iOS 9.1

Special iOS 9.1 iPad Pro Features

The iOS 9 update added split screen features to the iPad Air 2, but according to a report from 9to5Mac the iPad Pro will include upgraded versions to fit the bigger screen. 

We don't know what the exact changes are, but the report calls out, "optimized versions of Split-Screen apps, Picture-in-Picture video playback, Notification Center, and Siri."

Expect to see more when the iPad Pro release date arrives in November.