The Intel Core i9-9900K is the objective winner of this comparison, securing more total spec victories than the Intel Core i7-6700K. While both processors tied in five categories, the most impactful advantage belongs to the i9-9900K, which offers a 100% improvement in total cores. Conversely, the i7-6700K holds its own primary advantage in MSRP, where it is 31% better than its successor, providing a distinct edge for those prioritizing initial cost over raw core count.

Choose the Intel Core i9-9900K if your primary requirement is the increased core count, as this represents the most significant technical gain between the two options. If your priority is a lower MSRP, the Intel Core i7-6700K remains the more cost-effective choice. Select the former for tasks that benefit from the doubled core capacity, or opt for the latter if you are working within the constraints of the 31% better pricing advantage.