Intel Core i7 1265U 's Advantages
Better graphics card performance
Higher specification of memory (5200 vs 4800)
Lower TDP (15W vs 55W)
Intel Core i7 12800HX 's Advantages
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (2.0GHz vs 1.8GHz)
Larger L3 cache size (25MB vs 12MB)