All the x-less 7000 series chips max out at 90 watts power draw. In comparison, Apple M1 Max tends to "max out" at around 60-70 watts but can reach over 100 watts.
So, there's a third higher peak wattage with AMD compared to Apple Silicon. But this is still tiny, considering Intel 13-series chips consume up to 350 watts for the same loads.
But in return for that one third higher wattage with AMD, you get vastly better performance than Apple Silicon:
Cinebench (CPU testing):
R9 7900: single core 1,957, multi core 25,776
R7 7700: single core 1,846, multi core 15,909
R5 7600: single core 1,853, multi core 14,270
M1 Max (my own testing): single core 1,534, multi core 12,374
So, AMD is nearly a quarter faster in single core, and has around twice the multi core performance... All at 90 watts at most, while the Intel M1 Max is probably burning through around 60-70 watts at that point. I think that's almost equivalent power-per-watt. Both leave Intel in the dust.
(Data from
Linus Tech Tips video on x-less 7000 series and
AnandTech M1 Max review.)
If the M2 Max is merely an iterative improvement then it's likely it still won't match AMD's performance-per-watt figures here. This may well be why the M2 Pro/Max chips are delayed – Apple may be tweaking hardware to push performance more than they originally planned (e.g. pushing voltages, adjusting cooling, and so forth).
Please note, if anybody replies pointing out benchmarks are not representative of reality, then a nuclear missile will be dispatched to their domicile. Please don't point out the bleedin' obvious.