Theres a shitload of difference.
There thicker, wider and are very different.
Im not sure on ALL of the differences, but i know the gooseneck is a shitload thicker/bulkier then before, the dropouts run right up the deck, there wider, reinforcements are different, and there MUCH stronger.
There too many differences to list, Billie might be able to tell us all of them though.
And, im sure SOA will sell all the Nitro parts seperate.