Intel Core i3 6100 's Advantages
Higher base frequency (3.7GHz vs 2.5GHz)
Lower TDP (51W vs 65W)
Intel Core i9 11900 's Advantages
Released 5 years and 6 months late
Higher specification of memory (3200 vs 2133)
Larger memory bandwidth (50GB/s vs 34.1GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (16MB vs 3MB)