Also, the part numbers (and pictures) for the fuel pumps are different. I THINK the '14 fuel pump is higher pressure too. Whether they will mount on the other year's tank I don't know.
The gold scheme looks like a 2013 that I saw painted by Precision Motorcycle Painting in South Bend, IN. Don't know if they did this bike, but the one I saw was very similar. I believe one of the folks on this board had a post about Precision.
Yesterday, when we walked to the grocer around the corner I saw a red CB 750 Four on the sidewalk. Perfectly preserved, a black leather jacket hung over the handle bar ... man, it was wonderful!
My wife did not really understand why I stopped at the bike and gasped.