Meanwhile, the most power-efficient CPU is the new 5850U from AMD, and not apple M1:
The TDP is a non-standardized marketing term. You know what is fairly standardized? Watts.
Please Read The TDP is not the wattage consumed during peak load when these chips — or the constituent cores I should say — actually hit these single or multithreaded benchmarks. It’s merely a “hey this is roughly what this chip will consume at the base clock rate or the system is capable of dissipating with said chip after turbo boosting” and even then with cTDP of recent years it’s not invariably worth that much.
It’s not even funny how far ahead Apple & ARM reference cores on high-density/low-power libraries are in this regard.
The M1 is a great chip, but it's not some impossible unicorn that no one else can ever match.