As we all know, you have to take dyno numbers with a grain of salt. On a given day, it's fair to compare the figures of different cars on the same dyno. But with "corrected" figures etc who really knows? I've heard of dyno guys holding the (atmospheric) temprature probe in the hand to warm it up to fiddle with the temprature correction or something. And engine builds in US magazines often quote HP numbers as being altitude corrected too.
But the timeslip doesn't tell lies. Thats real world and in real time. Irrespective of what numbers a car puts out, the MPH is irrefutable proof of an engine having the goods or not. Whereas the ET tells more of a story about the chassis it's in. That ute has both.