2010-2012 are basically the same. very small changes that dont affect your question. 2013 and 2014 were upgraded and the only way to access the heated and cooled seats is through the touch screen controls. the 13/14 year trucks also runs on a different data system. therefors it is possible to upgrade to sync 3 if you so choose. because the 10-12 trucks didnt have this data system, they are not interchangeable. however these trucks made it a bit easier to change out the sound system. 13/14 trucks take more work (money) 13/14 trucks had hid headlights, cooled seats, different control figurations, steering wheel buttons, etc and a few other options added when compared to 10-12. as far as mechanical, the 2012 year introduced the torsen front diff so either truck will have it. the 13/14 trucks also had a reinforced rear frame. theres small stuff im missing, but if you can get the 14, go for it.