AMD Ryzen 5 PRO 8640U 's Advantages
Released 2 years and 3 months late
Higher base frequency (3.5GHz vs 2.9GHz)
More modern manufacturing process (4nm vs 6nm)
AMD Ryzen 5 6600U 's Advantages
Integrated graphics card
Higher specification of memory (LPDDR5-6400 vs DDR5-5600)
Newer PCIe version (4.0 vs 4)
Lower TDP (15W vs 28W)