The Intel Core i5-14400 wins in 8 out of 14 comparable specs, with 3 ties. Its biggest advantage is L2 Cache (280% better).
Core i9-10900K wins in 3 specs (Base Clock: 48% better).
Recommendation
Choose Core i5-14400 if you want the best overall performance — especially l2 cache.
Choose Core i9-10900K if base clock matters more to you.
