Intel Core i5 10400T 's Advantages
Higher base frequency (2.0GHz vs 1.5GHz)
Lower TDP (25W vs 35W)
Intel Core i9 11900T 's Advantages
Released 10 months late
Better graphics card performance
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Larger memory bandwidth (50GB/s vs 41.6GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (16MB vs 12MB)