Intel Core i5 9400F 's Advantages
Released 5 years and 2 months late
Higher specification of memory (2666 vs 1333)
Larger memory bandwidth (41.6GB/s vs 21.3GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (2.9GHz vs 2.0GHz)
More modern manufacturing process (14nm vs 22nm)
Intel Celeron J1900 's Advantages
Integrated graphics card
Lower TDP (10W vs 65W)