

Keep in mind that the Book 3, in either size, weighs considerably more than the Pro X.

You'll get far better native connectivity from the Book 3, though both devices work with the refreshed Surface Dock 2 if you need to add even more ports. The Pro X has two USB-C 3.1 ports, Surface Connect, and a slot for Nano-SIM, while the Book 3 includes two USB-A 3.1, USB-C 3.1, two Surface Connect (one on the tablet and one on the base), and a UHS-II card reader.

Whereas you need the base connected to the Book 3 to get the full experience, the Pro X is comfortable on its own. It has a stand on the back that folds out to prop up the tablet, which works brilliantly with the attachable keyboard (opens in new tab) that is sold separately. The Pro X is a continuation of the standard Pro lineup, which is closer to a standard 2-in-1 device with all hardware contained in the tablet portion.
