The Intel Core Ultra 9 285KF is the objective winner, securing victory in twelve of the sixteen comparable categories. Its most significant technical advantage is the L2 cache, which is 433% larger than that of the alternative. While the Intel Core i5-12400F remains competitive in specific areas, the superior cache capacity of the Ultra 9 285KF represents the most substantial performance-related improvement between these two processors.

Users prioritizing maximum hardware specifications and the largest L2 cache should select the Intel Core Ultra 9 285KF for their build. Conversely, the Intel Core i5-12400F is the logical choice for budget-conscious buyers, as it holds a 70% advantage in MSRP. Choosing between these components depends entirely on whether you require the expanded cache capacity of the higher-end model or the significant cost efficiency offered by the i5-12400F.