Intel Xeon E5 4617 's Advantages
Higher base frequency (2.9GHz vs 2.6GHz)
Lower TDP (130W vs 135W)
Intel Xeon E5 1686 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (30MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)