AMD Ryzen 5 7600X Advantages
Higher base frequency (4.7GHz vs 4.4GHz)
Lower TDP (105W vs 120W)
AMD Ryzen 9 9900X Advantages
Released 1 years and 9 months late
Higher specification of memory (5600 vs 5200)
Larger memory bandwidth (89.6GB/s vs 83.2GB/s)
Larger L3 cache size (64MB vs 32MB)
More modern manufacturing process (4nm vs 5nm)