The Intel Core Ultra 7 265K is the objective winner of this comparison, securing victories in ten out of fourteen measured specifications. Its most significant advantage over the Intel Core i7-6700K is its L2 cache, which is 3500% larger. While the older processor maintains a 64% lead in Max Turbo Power, the newer model dominates the majority of technical categories, establishing itself as the superior component based on the provided data.

Users prioritizing modern architecture and the substantial L2 cache advantage should select the Intel Core Ultra 7 265K for their build. Conversely, the Intel Core i7-6700K remains a viable choice for those specifically seeking the higher Max Turbo Power rating provided by that unit. Your final decision should depend on whether your specific computing needs are better served by the massive cache capacity of the newer processor or the power profile of the older model.