Intel Core i3 9300 's Advantages
Higher base frequency (3.7GHz vs 3.2GHz)
Lower TDP (62W vs 125W)
Intel Core i9 14900K 's Advantages
Released 4 years and 6 months late
Better graphics card performance
Higher specification of memory (5600 vs 2400)
Larger memory bandwidth (89.6GB/s vs 37.5GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (36MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)