Well according to this site ill post below I think you're going to get the same car regardless if you got the 2013 or a 2014.
Since the 2015 you have as an option is lacking some of the things you wanted I'll let you do your own research on changes from 2014 to 2015 if you are still going to consider it.
My 2013 has been pretty solid in from what I have experienced. I have had some things done under the bumper to bumper warranty, but I don't consider them to be model year specific issues. That being said all of the cars you have posted wont have the B2B warranty due to mileage so make sure which ever one you pick is in good shape.
Feel free to send me a PM if you want to discuss what I have had worked on for my car.
For you I think I the 2014 would be a better fit, because I think that if you are concerned about first model year problems. I would say for peace of mind that getting a first model year is not for you. Ultimately though I am just someone on the internet giving their $0.02. I think deep down you probably know what you want to do but were looking for some validation.
Most significant changes: Ford adds a new turbocharged 1.5-liter EcoBoost four-cylinder engine that is available with stop-start technology. Inflatable rear seat belts are available on all models.
Price change: The starting price for the base Fusion S is unchanged at $22,695 (including destination charge), the midlevel SE is up by $25 and the Titanium models are up by $300.
On sale: Since August
Which you should buy, 2013 or 2014? The 2013; changes on the 2014 models aren't significant enough to make them more desirable.
