As I remember the matte white 2016 models only were sold as Deluxe. The plastic inserts without holes that cover the threaded frame mounts for the backrest and rack were not available in that color. In fact one of our members had to get those inserts in another color and paint them to match when he removed his backrest. However...

All F6Bs have the threaded frame mounts for a backrest. Finding the brackets that even the aftermarket backrests use could be a challenge.