The Intel Core Ultra 5 250K Plus is the objective winner of this comparison, securing a lead in nine out of fourteen measured specifications. Its most significant technical advantage is its L2 cache, which is 216% larger than that of the Intel Core i5-14400. This substantial increase in cache capacity provides the primary performance edge for the newer processor, establishing it as the superior option across the majority of the evaluated hardware metrics.

Users prioritizing raw processing capacity and cache-heavy workloads should choose the Intel Core Ultra 5 250K Plus to leverage its superior architectural specifications. Conversely, the Intel Core i5-14400 remains the logical choice for those who prioritize power efficiency, as it maintains a 48% advantage in TDP. Selecting between these two components depends entirely on whether your specific build requirements favor the higher cache performance of the newer model or the lower power consumption of the i5-14400.