Intel Core i7 6700T 's Advantages
Integrated graphics card
Lower TDP (35W vs 165W)
Intel Core i9 9980XE 's Advantages
Released 3 years and 1 months late
Higher specification of memory (2666 vs 2133)
Larger memory bandwidth (79.47GB/s vs 34.1GB/s)
Newer PCIe version (3.0 vs 3)
Higher base frequency (3.0GHz vs 2.8GHz)
Larger L3 cache size (25MB vs 8MB)