Intel Core i5 10400H's Advantages
Better graphics card performance
Higher specification of memory (DDR4-2933 vs DDR4-2400)
Larger memory bandwidth (45.8GB/s vs 38.4GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (2.6GHz vs 1.1GHz)
Intel Celeron N4120's Advantages
Lower TDP (6W vs 45W)