Intel Core i5 9400F 's Advantages
Higher base frequency (2.9GHz vs 1.3GHz)
Intel Core Ultra 5 125UL 's Advantages
Released 5 years and 3 months late
Higher specification of memory (5600 vs 2666)
Larger memory bandwidth (89.6GB/s vs 41.6GB/s)
Newer PCIe version (4 vs 3.0)
Larger L3 cache size (12MB vs 9MB)
More modern manufacturing process (7nm vs 14nm)
Lower TDP (15W vs 65W)