Intel Core i5 8257U 's Advantages
Released 2 years and 11 months late
Better graphics card performance
Higher specification of memory (DDR4-2400 vs DDR4-2133)
Larger memory bandwidth (37.5GB/s vs 34.1GB/s)
Larger L3 cache size (6MB vs 3MB)
Intel Core i5 7200U 's Advantages
Higher base frequency (2.5GHz vs 1.4GHz)