AMD Ryzen 3 4300U 's Advantages
Larger memory bandwidth (68.27GB/s vs 44.0GB/s)
Lower TDP (10W vs 15W)
AMD Ryzen 5 7520U 's Advantages
Released 2 years and 8 months late
Higher specification of memory (LPDDR5-5500 vs LPDDR4-4266)
Higher base frequency (2.8GHz vs 2.7GHz)
More modern manufacturing process (6nm vs 7nm)