Intel Core i7 9800X 's Advantages
Released 4 years and 11 months late
Higher specification of memory (DDR4-2666 vs DDR3L-1333)
Larger memory bandwidth (79.47GB/s vs 21.3GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (3.8GHz vs 2.0GHz)
More modern manufacturing process (14nm vs 22nm)
Intel Celeron J1900 's Advantages
Integrated graphics card
Lower TDP (10W vs 165W)