Intel Core i5 8400T 's Advantages
Integrated graphics card
Lower TDP (35W vs 45W)
Intel Core 5 120HL 's Advantages
Released 6 years late
Higher specification of memory (5200 vs 2666)
Larger memory bandwidth (83.2GB/s vs 41.6GB/s)
Newer PCIe version (4 vs 3.0)
Higher base frequency (2.6GHz vs 1.7GHz)
Larger L3 cache size (18MB vs 9MB)
More modern manufacturing process (10nm vs 14nm)