The AMD Ryzen 9 7900 is the objective winner of this comparison, securing more individual specification victories across the evaluated fields. Its most significant advantage over the competition is its L3 cache, which is 78% larger. This substantial lead in high-level cache capacity provides the primary technical edge for the processor, distinguishing it as the superior option based on the total count of winning specifications identified in this analysis.

Users prioritizing the 78% larger L3 cache should select the AMD Ryzen 9 7900 for their build. Conversely, those who require the specific benefits of the Intel Core Ultra 9 285 should choose that component, as it offers a 233% larger L2 cache. Your final decision should depend on whether your specific workload relies more heavily on the superior L3 cache capacity of the former or the significantly larger L2 cache provided by the latter.