AMD Ryzen 3 7330U 's Advantages
Lower TDP (15W vs 30W)
AMD Ryzen 5 7640U 's Advantages
Better graphics card performance
Higher specification of memory (7500 vs 4267)
Larger memory bandwidth (89.6GB/s vs 51.2GB/s)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.5GHz vs 2.3GHz)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (4nm vs 7nm)