AMD Ryzen 7 7800X 's Advantages
Higher base frequency (4.5GHz vs 4.4GHz)
Lower TDP (105W vs 120W)
AMD Ryzen 9 9900X 's Advantages
Released 1 years and 5 months late
Higher specification of memory (5600 vs 5200)
Larger L3 cache size (64MB vs 40MB)
More modern manufacturing process (4nm vs 5nm)