Intel Core i9 9900KF 's Advantages
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (41.6GB/s vs 38.4GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (3.6GHz vs 2.0GHz)
Intel Celeron J4125 's Advantages
Released 10 months late
Integrated graphics card
Lower TDP (10W vs 95W)