Intel Celeron N4000 's Advantages
Lower TDP (6W vs 45W)
Intel Core i5 8400H 's Advantages
Better graphics card performance
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (41.8GB/s vs 35.76GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (2.5GHz vs 1.1GHz)