AMD Ryzen 5 5600U 's Advantages
Integrated graphics card
Higher specification of memory (LPDDR4-4266 vs DDR5-5600)
Lower TDP (10W vs 45W)
AMD Ryzen 5 PRO 8645HS 's Advantages
Released 3 years and 3 months late
Newer PCIe version (4 vs 3.0)
Higher base frequency (4.3GHz vs 2.3GHz)
More modern manufacturing process (4nm vs 7nm)