When buying my first road bike, the comparing the year was a big deal for me as components and the little extra features varied widely on the same model even 1 year apart. For example, the between the Pinarello Razha 2014 and 2015, the differences are: external vs. internal cable routing, 10-speed tiagra vs. 11-speed 105, Di2 compatibility. 2 of those were enough for me to consider the 2015 frame even though the older year model could be had at 20% discount. Since I'm pouring big bucks into buying a bike, I wanted to buy one that I knew I would be 100% satisfied with, not just a happy "compromise."