I compare 2014GS to 2015 and 2016 like everyone else said only major factory difference was 2015 and up was. Heavy fly wheel and few options like Gear shift asst, Keyless Start. I got great deal on 2014 demo bike with 1900 miles with every factory option available. Savings for demo vs new, demo bike was no brainer. Good luck to you
I'm not positive it's on GS, but on 2016 RT when you put on the brakes at a stop, it keeps the brakes engaged without having to hold the lever. Otherwise if you're on a hill, you don't have to juggle brakes, clutch and throttle when you take off.