Intel Core i5 8257U 's Advantages
Released 6 months late
Better graphics card performance
Higher specification of memory (DDR4-2400 vs DDR4-2133)
Newer PCIe version (3.0 vs 2.0)
Larger L3 cache size (6MB vs 2MB)
Intel Celeron 4205U 's Advantages
Higher base frequency (1.8GHz vs 1.4GHz)