The Intel Core Ultra 9 285 is the objective winner, securing victories in eleven out of fourteen comparable specifications. Its most significant technical advantage is the L2 cache, which is 3900% larger than that of the Intel Core i5-6600K. While the older processor maintains a lead in three specific categories, the newer model dominates the majority of the technical comparison, providing a substantial architectural upgrade in memory-related performance metrics.

Choose the Intel Core Ultra 9 285 if you require the superior L2 cache capacity for modern computing demands. Conversely, select the Intel Core i5-6600K if your primary priority is the MSRP, where it holds a 56% advantage over the newer component. This decision should be based strictly on whether you value the massive cache capacity of the newer architecture or the lower initial cost associated with the older hardware.