Intel Core i5 6500 's Advantages
Higher base frequency (3.2GHz vs 1.8GHz)
Intel Core i5 9400T 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2666 vs 2133)
Larger memory bandwidth (41.6GB/s vs 34.1GB/s)
Larger L3 cache size (9MB vs 6MB)
Lower TDP (35W vs 65W)