The Intel Core Ultra 5 245K is the objective winner of this comparison, securing victory in seven out of fourteen measured specifications. Its most significant technical advantage is a 174% larger L2 cache compared to the alternative. While the Intel Core i5-14400 holds its own in specific areas, the superior cache capacity of the newer model provides a clear architectural edge that defines its status as the more advanced component in this head-to-head evaluation.

Users prioritizing raw architectural efficiency and cache-heavy workloads should select the Intel Core Ultra 5 245K for its substantial L2 cache advantage. Conversely, the Intel Core i5-14400 remains the logical choice for those who prioritize power efficiency, as it offers a 48% better TDP rating. Choosing between these two processors depends entirely on whether your specific computing needs favor the increased cache throughput of the newer model or the lower power requirements of the i5-14400.