Intel Core i7 6900K 's Advantages
Larger memory bandwidth (76.8GB/s vs 45.8GB/s)
Higher base frequency (3.2GHz vs 2.8GHz)
Intel Core i9 10900F 's Advantages
Released 4 years late
Higher specification of memory (DDR4-2933 vs DDR4-2133)
Lower TDP (65W vs 140W)