The Intel Core i9-14900KS is the objective winner of this comparison, securing victory in ten out of fourteen measured specifications. Its most impactful advantage over the Intel Core i5-10400F is its L2 cache capacity, which is 2033% larger. While the i5-10400F maintains a lead in three categories, the i9-14900KS dominates the majority of the technical fields, establishing itself as the superior component based on the provided data.

Users prioritizing maximum technical specifications and the significant L2 cache advantage should choose the Intel Core i9-14900KS for their build. Conversely, the Intel Core i5-10400F is the appropriate selection for buyers who prioritize the MSRP, where it holds a 78% advantage over the alternative. Select the former for high-end cache performance or the latter if the initial cost is the primary factor in your decision-making process.