AMD Ryzen 9 4900H 's Advantages
Higher specification of memory (LPDDR4X-4266 vs LPDDR4-4266)
Larger memory bandwidth (68.27GB/s vs 51.2GB/s)
Higher base frequency (3.3GHz vs 1.8GHz)
AMD Ryzen 7 5700U 's Advantages
Released 10 months late
Lower TDP (10W vs 35W)