Money laundering is the process of transforming the profits of crime and corruption into ostensibly 'legitimate' assets.
The Surface Book is on the heavy side at around 1.5kg, but its footprint, at 31.23cm wide by 23.21cm deep, is perfectly acceptable for a laptop with a 13.5-inch screen. For the record, the Surface Pro 4 has a footprint of 29.21cm wide by 20.14cm deep. The hinge design adds a bit of height to the back of the chassis, so that when closed the Surface Book is relatively thick at the back -- 2.28cm, tapering to 1.3cm at the front.
The power is where you will find things that compare easier between the Surface Pro 4 and the Surface Book. The Surface Pro 4 comes with a suggested 9-hour battery life. You can get a 4GB, 8GB, and 16GB RAM with 128GB, 256GB, 512GB, 1TB storage options as well as the Intel Iris Chip for graphics.