The Intel Core Ultra 9 285KF is the objective winner, securing victory in ten out of fourteen comparable specifications. While the Intel Core i5-9600K maintains a significant lead in Max Turbo Power, which is 62% better than its counterpart, the newer processor dominates in cache architecture. The most impactful advantage for the Intel Core Ultra 9 285KF is its L2 Cache, which is 2567% better than the capacity found in the Intel Core i5-9600K.

Users prioritizing massive L2 Cache capacity for modern computing tasks should select the Intel Core Ultra 9 285KF, as it outperforms the older model across the vast majority of measured specifications. Conversely, the Intel Core i5-9600K remains the appropriate choice for those specifically requiring the higher Max Turbo Power advantage provided by this older architecture. Each component serves distinct needs based on these specific technical trade-offs.