The AMD Ryzen 9 9900X3D wins in 9 out of 14 comparable specs, with 2 ties. Its biggest advantage is L3 Cache (540% better).
Core i5-13400F wins in 3 specs (MSRP: 67% better).
Recommendation
Choose Ryzen 9 9900X3D if you want the best overall performance — especially l3 cache.
Choose Core i5-13400F if msrp matters more to you.
