The AMD Ryzen 7 9800X3D wins in 10 out of 14 comparable specs, with 1 tie. Its biggest advantage is L3 Cache (967% better).
Core i5-9600K wins in 3 specs (MSRP: 45% better).
Recommendation
Choose Ryzen 7 9800X3D if you want the best overall performance — especially l3 cache.
Choose Core i5-9600K if msrp matters more to you.
