Intel Core i5 8257U 's Advantages
Lower TDP (15W vs 28W)
Intel Core i5 1038NG7 's Advantages
Released 10 months late
Higher specification of memory (LPDDR4-3733 vs DDR4-2400)
Larger memory bandwidth (58.3GB/s vs 37.5GB/s)
Higher base frequency (2.0GHz vs 1.4GHz)
More modern manufacturing process (10nm vs 14nm)