If you look on the 6.4L section there are very few problems, and mostly fuel mileage concerns, but from what I have read there mileage is only getting higher the more mileage they get on it. As far as mirrors go the Chevy is still behind the superduty. Overall I would go to a dealership and drive both, compare the specs of the trucks your looking at and the price and then make your decsion. If I were to buy a truck tommarrow I would buy an 08 F-250 CC V-10 because the diesel option is expensive and uneeded for me.