AMD Ryzen 5 Pro 6650U 's Advantages
Lower TDP (15W vs 15W)
AMD Ryzen 5 8640U 's Advantages
Released 8 months late
Better graphics card performance
Higher specification of memory (LPDDR5x-7500 vs LPDDR5-6400)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Higher base frequency (3.5GHz vs 2.9GHz)