The Intel Core Ultra 7 265 is the objective winner of this comparison, securing victories in 12 out of 14 evaluated specifications. Its most significant technical advantage is the L2 Cache, which is 1700% larger than that of the Intel Core i9-9900K. While the older processor maintains a lead in base clock speed, which is 50% higher, the newer model dominates the majority of the measured categories, establishing it as the superior component based on the provided data.

Users prioritizing modern architectural improvements and significantly expanded cache capacity should choose the Intel Core Ultra 7 265 for their system. Conversely, the Intel Core i9-9900K remains a viable option for those who specifically require the higher base clock speed offered by that older design. Selecting between these two processors depends on whether your specific needs are better served by the massive cache advantage of the newer model or the higher base frequency of the legacy unit.