It's nice to see them not sniping at each other, yes.
And they do actually have a point. In general, comparisons across dyno brands are worthless, and even comparisons across different installations and operators of dynos of the same brand are difficult to reconcile at best.
I've seen dyno operators produce wildly different readings from the same car in subsequent runs on the same dyno just changing operating settings. Changing tyre pressures can impact readings on a rolling-road style dyno, changing how hard the car is tied down can impact readings, changing where the fan is located and pointed can result in variation (and hell, even with all those things the same, just different configurations of the same base car can impact ultimate readings - use a different gear and see what it does to torque values for instance).
Where dynos really add value is where you're testing before and after a mod for deltas in power and torque outputs, or where you're tuning a vehicle and want a repeatable set of controllable onditions to test with (full throttle, part throttle, trailing throttle, different load conditions, etc).
And none of this is valuable without data on what was going on at the time - altitiude, IAT's, exhaust readings, throttle position, gear, boost levels, etc.
In the end, the absolute peak power and torque values produced by dynos are largely useless. This is why drag times are considered so valuable (and even then, variations there need to be taken into account as well), in particular trap speeds as an indication of power levels (as they largely remove the variable of grip). Other than absolute values, or deltas, the other thing that dynos can show is the "area under the curve" for torque, or more specifically the shape of the area under the curve - that really shows how your power is delivered.
