The price tag of €999 will get you the base Wi-Fi model with Windows 10 Home edition. €1,099 will get you the same model with the Pro version of the OS. The WiFi+LTE model with Windows 10 Pro will set you back €1,199. The keyboard is included in all these packages, which is a very good thing.
The differentiation of prices based on storage is still not clear but the Amazon.de listing is for the 128GB model.