The Intel Core Ultra 5 250K Plus is the objective winner of this comparison, securing victory in ten out of sixteen measured specifications. Its most significant technical advantage is its L2 cache, which is 300% larger than that of the Intel Core i5-12400. This substantial increase in cache capacity provides the newer processor with a clear lead in architectural efficiency and data handling capabilities compared to the older model.

Users prioritizing raw processing potential and cache-heavy workloads should choose the Intel Core Ultra 5 250K Plus for its superior technical specifications. Conversely, the Intel Core i5-12400 remains the better option for those who prioritize power efficiency, as it offers a 48% advantage in TDP. Selecting between these two components depends entirely on whether your primary requirement is the increased cache capacity of the newer chip or the lower power profile of the older unit.