The AMD Ryzen 9 9900X is the objective winner of this comparison, securing a higher number of superior specifications across the evaluated fields. Its most significant advantage is the L3 cache, which provides a 78% improvement over the alternative. This substantial lead in cache capacity positions the AMD Ryzen 9 9900X as the more robust option for tasks that rely heavily on high-speed memory access to maintain efficient processing throughput.

Users prioritizing the specific benefits of the L3 cache should select the AMD Ryzen 9 9900X for their build. Conversely, those who require the architectural benefits of a larger L2 cache should choose the Intel Core Ultra 7 270K Plus, which offers a 233% advantage in that category. Your final decision should depend on whether your workload demands the superior L3 cache capacity of the AMD processor or the significantly larger L2 cache found in the Intel component.