AMD Ryzen 7 7840U 's Advantages
Released 3 years and 6 months late
Better graphics card performance
Higher specification of memory (LPDDR5x-7500 vs DDR4-2400)
Newer PCIe version (4.0 vs 2.0)
Higher base frequency (3.3GHz vs 1.1GHz)
Intel Celeron N4120 's Advantages
Lower TDP (6W vs 15W)