WHY can my buddie's Ford eat my Dodge's lunch?

[Bart]

We just came back from Utah. During the trip both ways when we hit hills he'd pull away from me like I turned the key off. Here is the scenrio, He's driving an '06 F350 6.litre, auto (6 speed auto???), 4.30 gears and stock tires. He has put one of those engine power boosters on and doesn't have (or care about) exhaust temps (gauge). As we start to pull the hill my exhaust that is already up around 1100-1200 goes to 1300 and that's when I start to defuel in an attempt to keep the exhaust no hotter than the 1300 degrees. Eventually, I end up droping out of overdrive and when the hill is steep enough going into second at a speed of around 35-40 mph.
So what's the deal? Is it that I could keep my foot in it and keep up with him (at the cost of my engine) or is his newer rig just that much better?
I have upgraded my turbo, exhaust system, injectors, timing, afc spring and plate. I plan on that ATS intake elbow in an attempt to lower exhaust temps. I also plan on head work to lower temp more. What else can I do? Live with it or buy a new rig. Wife would s***!!!!! Besides I've put so much into it now and it's paid for!!