Intel Core i3 6100 's Advantages
Integrated graphics card
Higher base frequency (3.7GHz vs 3.2GHz)
Lower TDP (51W vs 140W)
Intel Core i7 6900K 's Advantages
Released 8 months late
Higher specification of memory (DDR4-2133 vs DDR4-2133)
Larger memory bandwidth (76.8GB/s vs 34.1GB/s)
Larger L3 cache size (20MB vs 3MB)