Apple Silicon CPUs have been "in a whole different league" for performance per watt when compared with other laptop or desktop CPUs for 2 reasons, they where made using a newer CMOS process to which competitors did not have yet access and they were designed to have a higher IPC, so that they have the same speed as competing CPUs at much lower clock frequencies, which results in a lower power consumption.
On the other hand the comparison between Apple Silicon CPUs and "server-grade CPUs" has always been much less favorable for Apple. The reason is that the higher IPC of Apple CPUs does not matter for server applications. The server CPUs use the same low clock frequency as the Apple CPUs, resulting in the same low power consumption. An Intel or AMD core is slower than an Apple core, but that is compensated by more cores, and more cores with lower IPC have a better performance per watt than fewer cores with higher IPC.
Therefore, until recently the Apple Silicon CPUs had a single advantage vs. "server-grade CPUs": they were made in various "5 nm" process variants, while the best "server-grade CPUs" were made in various "7 nm" process variants.
Since the end of last year, and especially after the launch of today of AMD Bergamo, the existing Apple Silicon CPUs do not have any advantage for server applications a.k.a. multithreaded applications.
Only after the launch of the next Apple Silicon CPUs, made in a "3 nm" process, they would become competitive again. However that does not matter anyway, because Apple has abandoned a long time ago the idea of competing in server applications and for now they are not interested in such applications.
Whenever the intention is to praise the good performance per watt of Apple Silicon CPUs, they should always be compared with laptop or desktop CPUs, never with "server-grade CPUs", because in the latter case the numbers are very different.