In 2011 I had the chance to test drive brand new Ford, Chevy and Dodge SRW longbed F250/2500 pickups equally equipped as possible. It was at a GM sponsored event with two test track setups. One track had a lot of bumps and dips the other was smooth but with tight turns.
Of the 3 I liked the ride, comfort (leg,head & hip room) and interior of the chevy but the power of the ford. I ranked them chevy, ford and then dodge.
I currently have a 2007 C4500 chevy with the Duramax and Allison 6 speed. This engine and transmission combination is great for towing my 15,000lb 5th wheel. My engine is actually tuned with 30 less HP then the Duramax in the 2500 and 3500. So the 2500 or 3500 should be even better for towing. I was shopping for a Chevy 3500 dually crewcab when I came across this C4500 and couldn't pass up the deal otherwise I would have details about the 3500.