Sources close to Moore's Law Is Dead claim that the Alder Lake-U CPUs with up to 6 big cores and 8 little cores can deliver double the performance of current Tiger Lake-U models, and the single-core Alder Lake performance should be 20% better over the Rocket Lake CPUs. The top desktop Alder Lake CPUs with 8 big cores and 8 little cores may thus beat AMD's Ryzen 9 5900X models in multi-core loads.
https://www.notebookcheck.net/Leak-reveals-solid-performance-gains-for-the-upcoming-Intel-Alder-Lake-laptop-and-desktop-processors-likely-not-enough-to-beat-AMD-Zen3.521403.0.html