Intel Core i3 4170 's Advantages
Higher base frequency (3.7GHz vs 3.4GHz)
Lower TDP (54W vs 65W)
Intel Core i7 6700 's Advantages
Released 6 months late
Higher specification of memory (2133 vs 1600)
Larger memory bandwidth (34.1GB/s vs 25.6GB/s)
Larger L3 cache size (8MB vs 3MB)
More modern manufacturing process (14nm vs 22nm)