Intel Core i5 7600K Advantages
Better graphics card performance
Higher base frequency (3.8GHz vs 3.7GHz)
Lower TDP (91W vs 95W)
Intel Core i5 9600K Advantages
Released 1 years and 9 months late
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (41.6GB/s vs 35.76GB/s)
Larger L3 cache size (9MB vs 6MB)