Intel Core i7 9700K 's Advantages
Released 2 years and 5 months late
Integrated graphics card
Higher specification of memory (2666 vs 2133)
Higher base frequency (3.6GHz vs 3.4GHz)
Lower TDP (95W vs 140W)
Intel Core i7 6800K 's Advantages
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Larger L3 cache size (15MB vs 12MB)