Other Gorizont-class seem to have similar change in paint scheme at the bow. I think that the anchor difference is more of an illusion due to angle of the wreck, which is leaning away from the camera, whereas this one taken from a more farward position.

Under my point of view, the pics showing the bow and the bolbous,of the sinking vessel, do not match with the picture of the whole ship, this is much more big, look position of anchor and place where name has been painted.