Definitely F350 in my opinion. Very little difference in ride or price. Way more payload. But you should drive them for yourself. As for the 4.10, without looking it up and I may be wrong, I think the max tow rating is considerably higher. As for fuel economy I think you'll find the gasser is not very good anyway so I'd want the 4.10. As for the 6.7, that goes without saying.
As for 16 vs 17, I think that's a personal choice.
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