I owned both a C14 and own a 2017 RS. Have since replaced the C14 with a K16GT.
I really like the RS. I ride it the majority of the time. Compared to the C14 you will appreciate the lighter weight. It does handle better, and is more enjoyable in the twisties. Great torque, and good overall power. With the torque and better handling it is decidedly faster in the corners than my C14 was. The C14 owns the big end.
Features you can't get on a C14, which I like.
It's a great bike, I love mine. Depends on what kind of riding you want to do, etc.