Intel Core i7 8700 's Advantages
Higher base frequency (3.2GHz vs 3.0GHz)
Lower TDP (65W vs 125W)
Intel Core i9 13900K 's Advantages
Released 4 years and 11 months late
Better graphics card performance
Higher specification of memory (DDR5-5600 vs DDR4-2666)
Larger memory bandwidth (89.6GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Larger L3 cache size (36MB vs 12MB)
More modern manufacturing process (10nm vs 14nm)