The Intel Core i7-8700K is the objective winner of this comparison, securing victory in six of the fourteen evaluated specifications. Its most significant advantage over the Intel Core i5-6600K is its thread count, which is 200% better. While the Intel Core i5-6600K maintains a 32% advantage in MSRP, the superior thread capacity of the Intel Core i7-8700K provides a substantial technical lead across the majority of the measured categories.

Users prioritizing maximum thread capacity for their computing tasks should select the Intel Core i7-8700K to leverage its primary performance advantage. Conversely, those operating under strict budget constraints who value a lower MSRP should choose the Intel Core i5-6600K. By weighing the 200% thread improvement against the 32% cost benefit, buyers can align their choice with either the higher-spec capabilities of the newer processor or the initial savings offered by the older model.