AMD Ryzen 9 7940HS 's Advantages
Integrated graphics card
Higher specification of memory (LPDDR5x-7500 vs DDR5-5600)
Lower TDP (35W vs 45W)
AMD Ryzen 5 PRO 8645HS 's Advantages
Released 1 years and 3 months late
Newer PCIe version (4 vs 4.0)
Higher base frequency (4.3GHz vs 4.0GHz)