Intel Core i5 6500 's Advantages
Lower TDP (65W vs 95W)
Intel Core i5 9600K 's Advantages
Released 3 years and 1 months late
Higher specification of memory (2666 vs 2133)
Larger memory bandwidth (41.6GB/s vs 34.1GB/s)
Higher base frequency (3.7GHz vs 3.2GHz)
Larger L3 cache size (9MB vs 6MB)