Intel Core i5 7400 's Advantages
Better graphics card performance
Higher base frequency (3.0GHz vs 2.4GHz)
Intel Core i7 8700T 's Advantages
Released 1 years and 3 months late
Higher specification of memory (DDR4-2666 vs DDR4-2400)
Larger memory bandwidth (41.6GB/s vs 35.76GB/s)
Larger L3 cache size (12MB vs 6MB)
Lower TDP (35W vs 65W)