AMD Ryzen 7 4800H 's Advantages
Higher specification of memory (LPDDR4X-4266 vs LPDDR4-4266)
Lower TDP (35W vs 45W)
AMD Ryzen 9 5900H 's Advantages
Released 1 years and 3 months late
Higher base frequency (3.3GHz vs 2.9GHz)
Larger L3 cache size (16MB vs 8MB)