AMD Ryzen 5 6600HS 's Advantages
Better graphics card performance
Higher specification of memory (6400 vs 5200)
Lower TDP (35W vs 75W)
AMD Ryzen 5 7645HX 's Advantages
Released 1 years late
Larger memory bandwidth (83.2GB/s vs 76.8GB/s)
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (4.0GHz vs 3.3GHz)
Larger L3 cache size (32MB vs 16MB)
More modern manufacturing process (5nm vs 6nm)