Looks like they added reverse to the 1600's recently, which was a good move IMO. I actually had to have my wife help pull our C14 from a slight grade on packed dirt surface. Other minor changes noted in the article. The paint scheme on the GT is talking dirty to me.
https://www.cycleworld.com/2019-bmw-models-get-new-features-and-paint#page-5
https://www.cycleworld.com/2019-bmw-models-get-new-features-and-paint#page-5