It's the shift killing the race -- The car clearly has a "delay" as Laid_Black has to cross the gate going from 2nd to 3rd gear (~39 seconds into the video).
Obviously 2 cars with the same mods & transmissions (b/c of the gearing difference) would give the best representation of which tune can give more. BUT at the end of the day, who really cares though (unless you're tracking your car)
Be Safe, Go Fast & Have Fun