EMUI 9 is the successor of EMUI 8, which was based on Android Oreo. Now, Huawei has started rolling out the Android Pie-based EMUI 9 update for the European dual SIM variant of the standard Huawei Mate 10 (ALP-L29). The update has a download size of 3.94GB, which is typical of major Huawei OTA firmware updates but which remains unusually large in the broader Android world.
Although there is no screenshot of the changelog, we already know that EMUI 9 brings a streamlined UI and support for most Android Pie features. It also brings a new gesture navigation system. In terms of look and feel, EMUI 9 is an interesting hybrid of EMUI 8 and stock Android Pie. The UI has been significantly updated in terms of the aesthetics of the quick settings menu, but other aspects such as the status bar remain unchanged.