Intel Core i5 12600 's Advantages
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (3.3GHz vs 2.5GHz)
Intel Core i9 12900H 's Advantages
Better graphics card performance
Higher specification of memory (5200 vs 4800)
Larger L3 cache size (24MB vs 18MB)
Lower TDP (45W vs 65W)