The AMD Ryzen 9 7900 wins in 12 out of 14 comparable specs, with 1 tie. Its biggest advantage is L2 Cache (1100% better).
Core i5-6600K wins in 1 spec (MSRP: 43% better).
Recommendation
Choose Ryzen 9 7900 if you want the best overall performance — especially l2 cache.
Choose Core i5-6600K if msrp matters more to you.
