The Intel Core i5-14500 is the objective winner of this comparison, securing a lead in nine out of fourteen measured specifications. Its most significant technical advantage is the L2 Cache, which is 1333% larger than that found in the alternative. This substantial increase in cache capacity serves as the primary differentiator between the two processors, providing the Intel Core i5-14500 with a clear architectural superiority across the majority of the evaluated metrics.

Users prioritizing high-performance computing should select the Intel Core i5-14500 to leverage its vastly superior L2 Cache. Conversely, the Intel Core i5-8400 remains a viable option for those specifically seeking a lower Max Turbo Power, where it maintains a 58% advantage. Choosing between these components depends on whether your workflow requires the expanded cache capabilities of the newer model or the specific power profile offered by the older unit.