Intel Core i5 10400 's Advantages
Integrated graphics card
Higher base frequency (2.9GHz vs 1.5GHz)
Intel Core i5 14400T 's Advantages
Released 3 years and 8 months late
Higher specification of memory (4800 vs 2666)
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Newer PCIe version (5 vs 3.0)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (35W vs 65W)