Intel Core i5 9400H 's Advantages
Better graphics card performance
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (41.8GB/s vs 38.4GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (2.5GHz vs 1.1GHz)
Intel Celeron N4020 's Advantages
Released 7 months late
Lower TDP (6W vs 45W)