AMD Ryzen 5 7535U 's Advantages
Lower TDP (28W vs 30W)
AMD Ryzen 5 7640U 's Advantages
Better graphics card performance
Higher specification of memory (7500 vs 6400)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Higher base frequency (3.5GHz vs 2.9GHz)
More modern manufacturing process (4nm vs 6nm)