@Ghuncha
I am sorry but do not have the graph with me as it is on the system at the workshop. Why the difference in two dynos?
There are two types of chassis dynamometers on the market, inertia and loading. An inertia dynamometer (such as DynoJet) does not measure torque, but measures acceleration. A loading dynamometer applies resistance that is measured (using some type of strain gauge used dyno dynamics) This is the simpliest way I can explain it.