Intel Celeron J4005 's Advantages
Integrated graphics card
Lower TDP (10W vs 165W)
Intel Core i9 9900X 's Advantages
Released 10 months late
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (85GB/s vs 35.76GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (3.5GHz vs 2.0GHz)