It all depends on where the torque is being generated in the RPM range. A flat torque curve all the way to redline means that in WOT situations, the vehicle will still feel really fast at high RPM. Considering one of your trucks has at least 200+ hp and at least 400 lb-ft of torque, I think it is enough to make it go fast at highway speeds when passing.If that is the case then with full-size trucks it's almost completely backwards. They are quick in the city but the passing power from 60 on up is where they really shine because they are able to build the boost quick and stay on the power curve longer. Before I bought my 2014 I drove the same basic trucks , one with the 6.7 Cummins and the other with the 6.4 hemi, the hemi was a little peppier around town but on the highway the 6.7 was much stronger. Even in comparison with in the truck world. The Chevy and Ford's tend to be quicker in a drag from dead stop but on the highway the Dodge tended to perform better and it had the lower HP. I'm looking forward to driving one when the dealer gets one. The biggest thing will be how they program the trans to do it's job and that where manufacturers have gotten it wrong may time before.