It felt like Microsoft's tablet had finally come into bloom with the release of the Surface Pro 4. So while we eagerly await news of the follow-up, we thought it prudent to see how it compares with Microsoft's first laptop proper, the Surface Book.
Surface Pro 4: 292x201x8.45mm, 0.76-0.78kg
1x USB 3.0, Mini DisplayPort, microSD slot, 802.11a/b/g/n/ac WiFi, Bluetooth 4.0
Surface Book: 312×232x23mm, 1.51-1.57kg
2x USB 3.0 ports, 802.11a/b/g/n/ac WiFi, Bluetooth 4.0, Mini DisplayPort, SDXC reader
Surface Pro devices have never looked particularly elegant with their barely-rounded corners and trapezoid profiles. The Surface Pro 4, however, is the slimmest and lightest yet at 292x201x8.45mm and 0.76kg to 0.78kg depending on the internals. It's still just a bit too weighty to hold in one hand, and that doesn't change with the Surface Book either.
Again, the Surface Book is an unusual beast in terms of looks, down in part to the fulcrum hinge that serves as the undocking mechanism for the Clipboard (tablet) section.
Instead of the Surface Book's transforming tricks, the Pro uses a fully adjustable kickstand, complete with multi-point hinge, for extra firmness and stability.
Both devices are made from magnesium which would usually point to a strong build quality, but the Surface Book in particular shows some wobble with the two parts. Aside from the coiled hinge the Surface Book comes across as the more pedestrian-looking of the two.
The Surface Book weighs 0.73kg in tablet mode and 1.51kg/1.57kg (with discrete GPU) when docked. It's not the heaviest of devices, but it's rather unwieldy as a tablet/laptop hybrid.
Neither device loses out on the Surface Pen, which has the same 1,024 degrees of pressure sensitivity and "all year" battery life.