Intel Core i5 8257U 's Advantages
Better graphics card performance
Lower TDP (15W vs 25W)
Intel Core i3 10100T 's Advantages
Released 9 months late
Higher specification of memory (DDR4-2666 vs DDR4-2400)
Larger memory bandwidth (41.6GB/s vs 37.5GB/s)
Higher base frequency (3.0GHz vs 1.4GHz)