Intel Core i7 7700K 's Advantages
Better graphics card performance
Higher base frequency (4.2GHz vs 3.4GHz)
Larger L3 cache size (8MB vs 4MB)
Intel Celeron G6900 's Advantages
Released 5 years late
Higher specification of memory (DDR5-4800 vs DDR4-2400)
Larger memory bandwidth (76.8GB/s vs 35.76GB/s)
Newer PCIe version (5.0 vs 3.0)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (46W vs 91W)