No I don't believe any of those years has a better hull than the others.
If you go with the 14-15 mid year you will only get 1800 lbs internal ballast, no surf system, and the 350 motor. The later 2015's will have 2800 lbs, Gen 2 surf and the Raptor motor. 2016+ will get you GSA instead of Gen 2 surf.
So yes if you go with the 2014 you will need quite a bit of additional ballast bags with pumps and you will need to list the boat or add a surf device/system.
I would try to at least find a 2015 with the raptor and the 2800 lb tanks.