The latest Raspberry Pi SBCs can all be overclocked, but Hackaday has revealed that not all of them are created equal. It turns out that the Compute Module 4 and Pi 400 are more efficient than the regular Raspberry Pi 4, too.
https://www.notebookcheck.net/The-Raspberry-Pi-4-has-worse-overclocking-potential-than-the-Compute-Module-4-and-Pi-400.504556.0.html