AMD Ryzen 9 4900H 's Advantages
Integrated graphics card
Higher specification of memory (4266 vs 5)
Higher base frequency (3.3GHz vs 2.8GHz)
Larger L3 cache size (8MB vs 4MB)
AMD Ryzen 5 7520C 's Advantages
Released 3 years and 2 months late
Newer PCIe version (3 vs 3.0)
More modern manufacturing process (6nm vs 7nm)
Lower TDP (15W vs 54W)