Verdict
The iPad Pro is the most capable tablet Apple has ever produced, as a well as a massive canvas for creative types.
But let's not kid around here – it's not even in the same category as the Microsoft Surface Pro 4. Whether you gel with Microsoft's 2-in-1 vision for Windows 10 or not, there's no denying that it's a much more capable and flexible device than the iPad Pro.
The Surface Pro 4 is something that you might consider replacing your laptop or even desktop computer with, under certain circumstances. The iPad Pro is something you might consider replacing your iPad Air 2 with.
Both are fine devices, and Apple's peerless tablet-optimised app ecosystem and peerless hardware design continues to impress on its own terms. But Apple is pitching it as much more than a mere tablet, and it doesn't quite match up to those laptop-replacement ambitions.
The Surface Pro 4 is simply the more capable, flexible, and downright useful device of the two.