WHO CARE"S!!!!!!!
oops some of you do care eh! I would personally imagine that if this was done at sea level, the time differences and speeds would be a bit more equal. Being as that Toyota had all of 300hp vs the sealevel hp of 380 or so! Then compare to the elevation times/speeds......now one can see what a forced induction motor is nice at elevations!
In the mean time, I seem to recall a test by Pickupstruck.com that showed the initial year GM 6.0 gas with a 6 sp auto, starting to catch the almighty dmax in those tests. Those motors for that year were pretty close as I recall.
At the end of the day, depending upon the drivetrain etc, a 200 hp motor should be able to stay up with another 200hp motor, even if one is diesel lets say, has a max rpm of 2000, and a turbin doing some 20K rpm. Put the correct drivetrain for ea type of motor in the vehicles you are comparing, BOTH should do about the same speed up and down hills etc. Make both use the drivetrain BEST for the diesel......the turbine is screwed, put a drivetrain in for a turbine....the diesel is screwed!
marty