Intel Celeron J1900 's Advantages
Integrated graphics card
Lower TDP (10W vs 95W)
Intel Core i9 9900KF 's Advantages
Released 5 years and 2 months late
Higher specification of memory (DDR4-2666 vs DDR3L-1333)
Larger memory bandwidth (41.6GB/s vs 21.3GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (3.6GHz vs 2.0GHz)
More modern manufacturing process (14nm vs 22nm)