Intel Core i7 6800K 's Advantages
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Higher base frequency (3.4GHz vs 2.0GHz)
Larger L3 cache size (15MB vs 12MB)
Intel Core i7 9700T 's Advantages
Released 2 years and 11 months late
Integrated graphics card
Higher specification of memory (2666 vs 2133)
Lower TDP (35W vs 140W)