Intel Core i7 8850H 's Advantages
Higher base frequency (2.6GHz vs 2.0GHz)
Lower TDP (45W vs 55W)
Intel Core i7 12800HX 's Advantages
Released 4 years and 1 months late
Better graphics card performance
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 42.7GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (25MB vs 9MB)
More modern manufacturing process (10nm vs 14nm)