There is a difference though. Its the same thing we saw with Manziel: off field activities, maturity, and the will/desire to be the hardest worker in the room. Winston has all the physical tools, but do you trust him to put in the work to make himself great or will he be another Jamarcus Russel who thought that pure talent was enough.
The 14 game argument only holds water if the guy is putting in the work to better himself. If he's not, no amount of play time will make much of a difference.
All that being said I dont know how you dont roll the dice and pick him if you are in need of a QB. Just dont be surprised if hes a huge bust 4 years from now.