Intel Core i7 7700K 's Advantages
Better graphics card performance
Higher base frequency (4.2GHz vs 4.0GHz)
Lower TDP (91W vs 127W)
Intel Core i9 9900KS 's Advantages
Released 2 years and 9 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 (16MB vs 8MB)