Intel Core i3 10300 's Advantages
Higher base frequency (3.7GHz vs 3.5GHz)
Lower TDP (65W vs 125W)
Intel Core i9 11900K 's Advantages
Released 10 months late
Better graphics card performance
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 8MB)