Well, your question leads to the Chev. Vs. Ford never ending debate.
Rather than promote one brand over another let me give you my real life operating results.
I have a 2006 Ford, F-250, extended cab, long bed, tow package, 6.0 diesel turbo. I tow a 1968
24' Airstream Tradewind, duel axel, TT.
I travel travel all terrains, from mountians and coastal flatlands, without any power issue complaints.
I get 18 mpg without towing.
I get 15.6 mpg towing my TT.
I have a Ford F-150, V8, that I tried to tow the same 24' TT with. I got 10 mpg, I had no reserve power, and it sucked at going up Interstate grades. I droped to 52 mph in the mountians floorboarded.
That is why I bought a Ford 3/4 ton turbo Diesel.