delta t and real temp

[grandpatzer]

So Ive read bunch of radiator reviews and it seems to be common to measure the water temperature.

In real life if Radiator A has delta t 15c and Radiator B has 17c.

Lets say a 7970 is 55c on load with A, would this same 7970 be 57c on load with B?


Or did I miss something, also I would think I need to fin reviews where the temperature was run long enough to stabilize temps.
Maybe runnin 5min show delta t difference only 2c, but running 5h shows difference delta t 15c etc........