Intel Celeron N4020 's Advantages
Lower TDP (6W vs 9W)
Intel Core i5 1240U 's Advantages
Released 2 years and 3 months late
Better graphics card performance
Higher specification of memory (LPDDR5-5200 vs DDR4-2400)
Larger memory bandwidth (76.8GB/s vs 38.4GB/s)
Newer PCIe version (4.0 vs 2.0)
More modern manufacturing process (10nm vs 14nm)