Intel Core i5 9400F 's Advantages
Higher base frequency (2.9GHz vs 2.5GHz)
Intel Core i9 11900F 's Advantages
Released 2 years and 2 months late
Higher specification of memory (3200 vs 2666)
Larger memory bandwidth (50GB/s vs 41.6GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (16MB vs 9MB)