Did some comparative photographs today, comparing the desaturated JPEGs from the regular camera and the JPEGs created by the monochrome camera.
The files can be found on this flickr album.
Note that files from the regular camera are indicated by "cof" while files from the monochrome camera are indicated by "mon".
The EXIF data confirms what was to be expected, the monochrome camera is by a bit over 1 f-stop more light sensitive. The monochrome mode could therefore be pretty interesting for low light street-photography. Maybe with image contrast maxed out and image brightness reduced.
Stay tuned for more Huawei P9 imaging experiments, tips and tricks.