The Intel Core Ultra 9 285K is the objective winner of this comparison, securing victories in eleven of the sixteen evaluated categories. Its most significant technical advantage is the L2 cache, which is 321% larger than that of the Intel Core i5-13400F. This substantial lead in cache capacity highlights the superior architectural scaling and data handling capabilities of the newer processor, establishing it as the more robust option across the majority of measured specifications.

Users prioritizing maximum hardware capability and cache-heavy performance should select the Intel Core Ultra 9 285K for their build. Conversely, the Intel Core i5-13400F is the logical choice for budget-conscious buyers, as it maintains a 67% advantage in MSRP. By choosing the latter, consumers sacrifice the advanced cache capacity of the former to achieve a significantly more favorable price point, making it the preferred option for those focused on cost-efficiency.