The AMD Ryzen 7 5700X3D wins in 7 out of 14 comparable specs, with 3 ties. Its biggest advantage is L3 Cache (500% better).
Core i9-9900K wins in 4 specs (Max Turbo Power: 33% better).
Recommendation
Choose Ryzen 7 5700X3D if you want the best overall performance — especially l3 cache.
Choose Core i9-9900K if max turbo power matters more to you.
