Intel Core i5 8400T's Advantages
Integrated graphics card
Intel Core i3 14100T's Advantages
Released 5 years and 9 months late
Higher specification of memory (DDR5-4800 vs DDR4-2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5 vs 3.0)
Higher base frequency (2.7GHz vs 1.7GHz)
Larger L3 cache size (12MB vs 9MB)
More modern manufacturing process (10nm vs 14nm)