What kind, size and weight trailer? Also, your friend's truck has the (almost anemic) 4L80 transmission. Not much get up and go, but worthy for use in a tank. Is his a 2500 or a 2500HD? There's a difference.well we started with the manuals, the only stat that was better for him was his capacity. he had about 600lbs on the tundra. but the tundra could tow more lb wise. so we hooked up my trailer and took both trucks out for a test run. it wasnt even close. tundra out preformed everywhere. power was no comperision. braking was better, acceleration was better. and the ride was smother.