Mainly the large 13" screen. My partner has a job which involves reading lots of documents, taking notes and then reading/sending emails. The iPad Pro is more

Mainly the large 13" screen. My partner has a job which involves reading lots of documents, taking notes and then reading/sending emails. The iPad Pro is more comfortable than the rest of the range for split screen mode. The notes can all be written with the pencil and then the iPad can be easily attached to a keyboard for when you need to send long emails.