AMD Ryzen 9 4900H 's Advantages
Larger memory bandwidth (68.27GB/s vs 44.0GB/s)
Higher base frequency (3.3GHz vs 2.8GHz)
Larger L3 cache size (8MB vs 4MB)
AMD Ryzen 5 7520U 's Advantages
Released 2 years and 6 months late
Higher specification of memory (5500 vs 4266)
More modern manufacturing process (6nm vs 7nm)
Lower TDP (15W vs 54W)