Intel Core i5 6600 's Advantages
Integrated graphics card
Higher base frequency (3.3GHz vs 3.0GHz)
Lower TDP (65W vs 140W)
Intel Core i7 6950X 's Advantages
Released 8 months late
Higher specification of memory (2133 vs 2133)
Larger memory bandwidth (76.8GB/s vs 34.1GB/s)
Larger L3 cache size (25MB vs 6MB)