Intel Core i5 9400F 's Advantages
Higher base frequency (2.9GHz vs 2.7GHz)
Intel Core i5 14600 's Advantages
Released 5 years late
Integrated graphics card
Higher specification of memory (DDR5-5600 vs DDR4-2666)
Larger memory bandwidth (89.6GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (24MB vs 9MB)
More modern manufacturing process (10nm vs 14nm)