The Intel Core i7-8700K is the objective winner of this comparison, securing more total spec victories than the Intel Core i5-9600K. The most impactful advantage for the winning processor is its thread count, which is 100% better than that of its counterpart. While the Intel Core i5-9600K holds a 27% advantage in MSRP, the superior thread capacity of the Intel Core i7-8700K makes it the more robust option across the majority of measured specifications.

Users who prioritize multitasking and heavy workloads should choose the Intel Core i7-8700K to leverage its significant thread advantage. Conversely, the Intel Core i5-9600K is the better choice for budget-conscious buyers who want to capitalize on its 27% better MSRP. Selecting between these two processors depends entirely on whether your primary goal is maximizing thread-heavy performance or minimizing the initial cost of your build.