In my opinion, any of them are fine. The chassis, engine, and transmissions are all the same. 2014 brought a different display that added a few features. 2016 brought the three sport modes and the new bodywork. It's purely personal taste on the bodywork, but I like the original better except that the muffler is nicer on the 2016. I thought the three sport modes would be awesome, but after trying it out I didn't think it was work paying any extra for. The seat is bad on all of them.