Can the iPad Pro take on the Surface Pro at work?

From the get go, it was inevitable that Apple's new iPad Pro would be compared to Microsoft's Surface Pro 3 (and the newer Surface Pro 4). The iPad Pro borrows heavily from the Surface Pro design with its larger form factor (a 12.9-in. screen), keyboard cover and support for a stylus -- Apple calls it the "Pencil." Diverging from Microsoft's vision, however, the iPad Pro relies on a purely mobile operating system -- iOS -- while the Surface Pro runs the same version of Windows as a desktop PC.