The Intel Core i5-13400F is the objective winner of this comparison, securing victories in nine out of fourteen measured specifications. Its most significant technical advantage is the L2 cache, which is 533% larger than that found in the Intel Core i5-9400F. 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 modern architecture and high-capacity cache should select the Intel Core i5-13400F for their build. Conversely, the Intel Core i5-9400F remains a viable choice for those specifically seeking a lower Max Turbo Power, as it holds a 56% advantage in that category. Choosing between these two components depends on whether your system requirements favor the expanded cache capabilities of the newer model or the power efficiency profile of the older unit.