Intel Core i5 8400T 's Advantages
Integrated graphics card
Higher base frequency (1.7GHz vs 1.2GHz)
Lower TDP (35W vs 45W)
Intel Core Ultra 5 125HL 's Advantages
Released 6 years 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 (18MB vs 9MB)
More modern manufacturing process (7nm vs 14nm)