The AMD Ryzen 7 9700X is the objective winner of this comparison, securing victory in twelve out of fourteen measured specifications. The most significant technical advantage held by this processor is its L2 cache, which is 433% better than that of the Intel Core i7-8700K. This substantial improvement in cache capacity serves as the primary differentiator between the two components, establishing the former as the superior choice across the vast majority of evaluated metrics.

Users looking for the most modern and capable hardware should choose the AMD Ryzen 7 9700X, as it outperforms the Intel Core i7-8700K in nearly every category. The Intel Core i7-8700K remains a legacy option that does not lead in any of the fourteen measured specifications. Consequently, those prioritizing the latest architectural advancements and the significant L2 cache capacity increase should opt for the Ryzen 7 9700X for their system build.