Apple's chips are faster than all ARM competition per watt. The only competitor coming close to AMD Ryzen 6800u has better performance per watt (within 20% of Apple's M2) [0] while Snapdragon 8 Gen 1 [1] has about half.

[0] https://www.notebookcheck.net/AMD-Ryzen-7-6800U-Efficiency-R...

[1] https://gadgetversus.com/processor/apple-m1-vs-qualcomm-sm84...