Intel Core i7 6700HQ 's Advantages
Higher base frequency (2.6GHz vs 2.0GHz)
Lower TDP (45W vs 55W)
Intel Core i7 12800HX 's Advantages
Released 6 years and 8 months late
Higher specification of memory (4800 vs 2133)
Larger memory bandwidth (76.8GB/s vs 34.1GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (25MB vs 6MB)
More modern manufacturing process (10nm vs 14nm)