The temperature measurements were obtained after running 40 loops of 3DMark Fire Strike Extreme's stress test and checking the peak sustained temperature. Similarly, the total system power consumption figures were read off a power meter during a run of Fire Strike Extreme.
The peak temperature numbers pretty much scaled according to performance, with the GeForce RTX 2080 Super slotting in between the GeForce RTX 2080 Ti and 2080. All the cards use the same cooler too, so the higher temperatures are a direct reflection of the more powerful GPUs.
The same goes for power consumption, with the GeForce RTX 2080 Super easing past the GeForce RTX 2080 in terms of power drawn. Oddly enough, it also drew more power at idle than the GeForce RTX 2080 Ti, even though the overall power numbers were still lower.