The Intel Core Ultra 5 245KF is the objective winner of this comparison, securing a lead in seven out of fourteen measured specifications. Its most significant technical advantage is its L2 cache, which is 174% larger than that of the Intel Core i5-14400. While the latter component holds its own in specific areas, the superior cache capacity of the Ultra 5 245KF establishes it as the more advanced processor based on the provided data.

Users prioritizing raw technical capacity and the expanded L2 cache should select the Intel Core Ultra 5 245KF for their build. Conversely, the Intel Core i5-14400 is the better choice for those who prioritize power efficiency, as it offers a 48% advantage in TDP. Choosing between these two processors depends entirely on whether your primary requirement is the increased cache performance of the newer model or the lower power consumption profile of the i5-14400.