I am looking for some information on the difference between a 2015 Deluxe and a 2016 Deluxe. Are there any upgrades or changes in the newer year model that would make you buy the 2016 over the 2015? Other than the one year mewer and less miles, they look the same, just need to know if there were significant changes. There is about $3,500 difference in price, I'd love to save the money and buy the 2015.