Intel Core i5 8257U 's Advantages
Better graphics card performance
Lower TDP (15W vs 45W)
AMD Ryzen 7 7745HX 's Advantages
Released 3 years and 6 months late
Higher specification of memory (DDR5-5200 vs DDR4-2400)
Larger memory bandwidth (83.2GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (3.6GHz vs 1.4GHz)
Larger L3 cache size (32MB vs 6MB)