The Intel Core i7-11700K is the objective winner of this comparison, securing more individual specification victories than its counterpart. Its most significant technical advantage is the L2 cache, which offers a 100% improvement over the Intel Core i9-9900K. This substantial increase in cache capacity provides the primary performance edge for the newer processor, allowing it to outperform the older model across the majority of the measured technical categories.

Users prioritizing modern architecture and the superior L2 cache capacity should select the Intel Core i7-11700K for their build. Conversely, the Intel Core i9-9900K remains a viable option for those who specifically require the 62% advantage in Max Turbo Power provided by that model. Choosing between these two components depends entirely on whether your specific computing needs favor the increased cache efficiency of the newer generation or the higher power ceiling of the older unit.