Intel Core i9 10900 's Advantages
Higher base frequency (2.8GHz vs 2.5GHz)
Larger L3 cache size (20MB vs 16MB)
Intel Core i9 11900 's Advantages
Released 10 months late
Better graphics card performance
Higher specification of memory (DDR4-3200 vs DDR4-2933)
Larger memory bandwidth (50GB/s vs 45.8GB/s)
Newer PCIe version (4.0 vs 3.0)