The AMD Ryzen 9 9950X3D wins in 9 out of 14 comparable specs, with 2 ties. Its biggest advantage is L3 Cache (611% better).
Core i5-12400 wins in 3 specs (MSRP: 73% better).
Recommendation
Choose Ryzen 9 9950X3D if you want the best overall performance — especially l3 cache.
Choose Core i5-12400 if msrp matters more to you.
