Intel Core i9 12900H 's Advantages
Lower TDP (45W vs 65W)
Intel Core Ultra 9 285H 's Advantages
Released 2 years and 11 months late
Higher specification of memory (7467 vs 5200)
Larger memory bandwidth (102.4GB/s vs 76.8GB/s)
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (3.7GHz vs 2.5GHz)
More modern manufacturing process (5nm vs 10nm)