AMD Ryzen 7 7730U 's Advantages
Lower TDP (15W vs 15W)
AMD Ryzen 5 7640U 's Advantages
Better graphics card performance
Higher specification of memory (LPDDR5x-7500 vs LPDDR4x-4267)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.5GHz vs 2.0GHz)