Intel Core i5 12600H Advantages
Higher base frequency (2.7GHz vs 2.0GHz)
Larger L3 cache size (18MB vs 12MB)
Intel Core Ultra 7 255U Advantages
Released 3 years late
Higher specification of memory (8400 vs 5200)
More modern manufacturing process (3nm vs 10nm)
Lower TDP (15W vs 45W)