Intel Core i9 10900 's Advantages
Better graphics card performance
Higher base frequency (2.8GHz vs 2.6GHz)
Larger L3 cache size (20MB vs 12MB)
Intel Core i5 11400 's Advantages
Released 10 months late
Higher specification of memory (3200 vs 2933)
Larger memory bandwidth (50GB/s vs 45.8GB/s)
Newer PCIe version (4.0 vs 3.0)